Tag Archives: plant

March 8, 2021

Recent Developments in Supercritical CO₂ Winterization

By Aaron Green

Supercritical carbon dioxide (CO₂) extraction is a processing technique whereby CO₂ is pressurized under carefully controlled temperatures to enable extraction of terpenes, cannabinoids and other plant molecules. Once the extract is obtained the crude is often subjected to an ethanol winterization process to remove chlorophyll, fats and waxes.

Green Mill Supercritical is a Pittsburgh-based manufacturing and engineering company focused on cannabis and hemp extraction. The company offers a range of CO ₂ extraction equipment where users can tune and control their extraction methods. They recently announced a technology advance enabling winterization in-process, which has the potential to remove the need for ethanol winterization.

We spoke with Jeff Diehl, director of marketing at Green Mill Supercritical, to learn more about the new process. Jeff was working in the tech industry in San Francisco in 2017 when he was invited to join Green Mill by his cousin, Jeremy Diehl, who is the founder and CTO.

Aaron Green: Before we get to your new technology, can you explain what industry trends you are watching?

Jeff Diehl: A big thing that I watch is the premium extract space. More and more consumers are demanding higher premium extracts. They want differentiated products. They want products that are safe and that have some kind of meaningful connection to the specific plant from which they came. Right now, CO₂plays a small role in the market for those products. Most premium products are generated through hydrocarbon extraction. So, I am watching how people are using CO₂to create the next generation of safe, premium products.

Aaron: What is the normal process for a CO₂ extraction today?

Jeff Diehl, director of marketing at Green Mill Supercritical

Jeff: The current CO₂ extraction process generally consists of two major phases to producing your final extract. In the first phase, you have extraction where you get your crude product. The second phase is post-extraction where you do cleanup to get your refined oil. Within that post-extraction phase, most operations include an ethanol-based winterization process.

Aaron: What does the winterization step do, exactly?

Jeff: Winterization is about removing waxes. Your main extraction is considered crude because it’s got a lot of materials from the plant that you don’t want. The large majority of unwanted material is waxes. Winterization is the process of using a solvent, traditionally ethanol, to separate the waxes from the cannabinoids. There are multiple challenges inherent in ethanol-based winterization that introduce cost, time and product loss. It’s terribly inefficient. Plus, there will always be residual ethanol left in your final product, and that’s not something consumers appreciate.

Aaron: You’ve recently announced a new process at Green Mill that moves the winterization step into the supercritical CO₂ equipment. Can you explain how that works?

Jeff: With our process, which we call Real-Time Winterization, there is no ethanol involved in winterization anymore. It is all done with CO₂ during the primary extraction. That’s the major advance of our process and although it has been attempted before, no one has succeeded at doing it in a viable way. You take a process which is normally four days – one day for CO2 extraction and three days for ethanol winterization – and you do it all in less than a day. We have automated software, sensors and pumps that makes this all possible.

Aaron: How does the quality of the resulting product compare with the new process?

Jeff: You can see the difference right away, if you’re at all familiar with extraction. It just looks clean and bright. Lab analysis has been very positive thus far, but we continue to run tests. Our R&D team has done multiple tests, mostly on hemp and CBD. That’s because we don’t have a license for THC. We’re currently engaging with a licensed partner so that we can collect more data on THC-containing products, so we can give exact numbers. But with CBD, we’ve done multiple tests to validate the method and the technology, and are seeing consistently excellent results in regards to both purity of the product and efficiency of the process.

Aaron: How do yields compare between the processes?

Jeff: From the data that we’ve seen in the industry, it looks like when you winterize with ethanol, you leave anywhere from 5 to 10% of your cannabinoids behind in the waxes. That’s just lost. With Real-Time Winterization using CO₂ we have seen recovery rates as high as 99%. We are continuing to investigate that result with testing to make sure it was not an outlier, but in any case, recovery rates look promising.

Aaron: One of the other issues with ethanol is taxes and the ability to find food grade supply. Do you have any perspective you can share on that?

Jeff: There are a number of advantages to moving away from ethanol. The sheer quantity of ethanol is a factor. There are a lot of regulations and fire requirements around managing large quantities of ethanol. The ethanol winterization process itself is not just one process. There are multiple stages, from mixing, to freezing, to filtering, to removing the solvent. These are all opportunities for things to go wrong, so you’re always managing those risks. Multiple large pieces of equipment, including fume hoods, filter skids, cryo freezers and rotary evaporators, are expensive and require heavy management.

I think Elon Musk said the best process is no process. Anytime in an industrial process when you can remove steps in the process, that’s the direction you want to go in. And, that’s what we’ve done. With this recent work, we have effectively removed post processing for certain categories of end product.

Aaron: Do you have any patents on the new process?

Jeff: We have a patent pending on both the method and the equipment, which is allowing us to talk about this as much as we are.

Aaron: So, how does this work if somebody already owns an existing piece of Green Mill equipment? Is this something that can be retrofitted? Is it a software upgrade?

Jeff: There are two components. One is an equipment upgrade, which can be done retroactively for existing customers, and one is a methodology upgrade, which we assist our customers with. The automation software inherently can handle the settings that you need to run the methodology. In fact, it’s that software and the rest of our existing tech stack, the proprietary pump, the triple inline fractionation, the precision and stability of the overall system, that is what made this winterization advance possible.

Aaron: Where are you rolling this out first? And do you plan to go international?

Jeff: International is definitely in the plan, since we’ve already sold systems abroad. We are currently getting ready to announce the opening of our beta program with the new technology. So, we’re not ready to sell this widely at this time, but we are taking submissions from companies that want to get in early and join us at the forefront of CO₂ extraction innovation.

Aaron: Okay, great. Thanks Jeff, that’s the end of the interview.

March 3, 2021

Navigating Compliance: Practical Application of Fit-For-Purpose

By Darwin Millard

No Comments

What is “fit-for-purpose?” Fit-for-purpose is an established best practice used in several major industries, like information technology, pharmaceuticals, agriculture and inventory management. It is a concept that aligns infrastructure and systems specifications with desired outputs – be that product, service or bottom line. When applied to a cannabis plant, its parts, products and associated processes, it can streamline regulatory framework development, implementation and compliance.

Fit-for-purpose is simply a series of logic questions you ask yourself to determine what business practices you should implement and the regulatory framework in which you must comply. What are you making? Who is it for? Where will it be sold? All this impacts how you would cultivate, process, handle and store a cannabis plant, its parts and products regardless of the type of cannabis plant. The fit-for-purpose concept is a tool that can be applied to any scenario within the cannabis/hemp marketplace. Take for instance, sustainability: a practical example would be to design cultivation standards that are “fit-for-purpose” to the climatic region in which the plants are grown – allowing any type of cannabis plant grown anywhere in the world to meet specifications regardless of the method of production.

There is no “special sauce” here. All fit-for-purpose does is get you to ask yourself: “Are the protocols I am considering implementing ‘fit/appropriate’ to my situation, and if not, which protocols are more ‘fit/appropriate’ based on the products I am making, the target consumer and marketplace in which the products are to be sold?”“Fit-for-purpose is a powerful concept that can be used for simplifying regulatory framework development, implementation and compliance”

A non-cannabis/hemp example of fit-for-purpose could be a scenario where a banana producer wants to implement a data management system into their cultivation practices to better track production and yields. There are many data management systems this banana producer could implement. They could implement a data management system like that of big pharma with multiple levels of redundancy and access control related to intellectual property and other sensitive data. They could also implement a data management system used for tracking warehouse inventory; it cannot exactly capture everything they need but it is better than nothing. Neither example is really “fit/appropriate” to the banana producer’s needs. They need something in between, something that allows them to track the type of products they produce and the data they want to see in a way that is right for them. This idea is at the core of the fit-for-purpose concept.

Applying Fit-for-Purpose

So how do we apply fit-for-purpose to the cannabis/hemp marketplace? Fit-for-purpose reduces the conversation down to two questions: What products are you planning to make and how do those products affect your business practices, whether that be cultivation, processing, manufacturing or compliance. The point being the products you plan to produce determine the regulations you need to follow and the standards you need to implement.

Growers can use it to guide cultivation, harvesting, handling and storage practices. Processors and product manufacturers can use it to guide their production, handling, packing and holding practices. Lawmakers can use it to guide the development, implementation and enforcement of commonsense regulations. This is the beauty and simplicity of fit-for-purpose, it can be applied to any situation and related to any type of product.

Let us look at some practical examples of fit-for-purpose for cultivators and processors. Cultivators have three main areas of focus, growing, harvesting and storage, whereas processors and product manufacturers have it a little more complicated.

Cultivation of a Cannabis Plant

Growing

Requirements for growing a cannabis plant, including those that can be classified as “hemp”, should be dictated by the product with the strictest quality and safety specifications. For example, growing for smokable fruiting tops (i.e. the flowers) may require different cultivation techniques than other products. You may not want to apply the same pesticides or growth additives to a cannabis plant grown for smokable fruiting tops as you would to a cannabis plant grown for seed and fiber.

Harvesting

The next point is important – harvesting and handling requirements should be agricultural, period. Except for those products intended to be combusted or vaporized and then inhaled. Following our previous example, smokable fruiting tops may require different harvesting techniques than other products, especially if you are trying to maintain the aesthetic quality of these goods. You may choose a different harvesting technique to collect these fruiting tops than you would if primarily harvesting the seed and fiber and thinking of the leftover biomass as secondary.

Storage

When considering the products and their storage, you need to consider each one’s quality and safety specifications. One product may have a temperature specification, whereas another may have a humidity specification. You need to make sure that you store each product according to their individual quality and safety specifications. Then consider the products with the highest risks of diversion and potentially if you need to implement any extra protocols. Continuing our example – smokable fruiting tops, whether classifiable as “hemp” or not, pose a higher risk of theft than seeds or fiber and may require additional security measures depending on the authority having jurisdiction.

Processing and Manufacturing Operations

When applying fit-for-purpose to processing and manufacturing operations, first you must choose the products you want to make and specify the intended use for each product. This allows you to identify the quality and safety requirements and the potential for diversion for each good. Which in turn allows you to specify your manufacturing, processing and handling protocols for each product related to their quality and safety requirements. Then those specific products with higher risks of diversion requiring extra protocols to be put into place depending on local regulations and/or internal risk assessments, should be considered and your practices modified, as necessary.

Commonsense Regulations

Image if regulations governing a cannabis plant, its parts, products and associated processes were based on the intended use rather than a set of attributes that vary from jurisdiction to jurisdiction. It is complicated enough for regulators to think about a cannabis plant or cannabis product without having to worry about if that cannabis plant or cannabis product can be classified as “marijuana” or “hemp.” Fit-for-purpose removes this complication and simplifies the debate.

Using a fit-for-purpose approach eliminates the need to think about the molecular constituents and focuses the conversation on the intended use rather than one or two specific molecules – in this case, d9-THC, the boogie-man cannabinoid. Considering the intended use promotes consumer and environmental health and safety by allowing operators and regulators to focus on what is most important – quality and safety instead of whether something is “marijuana” or “hemp.”

This idea is what drives the real impact of fit-for-purpose. It creates a path forward to a one plant solution. We have where we are now – with “marijuana” and “hemp” – and where we want to get to – cannabis. It is all one plant with many different applications that can be used to create different commercial products. Fit-for-purpose helps bridge the gap between where we are now and where we want to get to and allows us to start thinking about “marijuana” and “hemp” in the same manner – the intended use.

Fit-for-purpose is a powerful concept that can be used for simplifying regulatory framework development, implementation and compliance. Regulations imposed on a cannabis plant, its parts and products should be appropriate to their intended use, i.e. “fit-for-purpose.” This approach challenges the confines of the current draconian bifurcation of the cannabis plant while working within this system to push the boundaries. It creates a path forward to a one plant solution and begs the question: Is the world ready for this novel concept?

February 3, 2021

Canadian Lab Offers Vapor/Smoke Analysis

By Cannabis Industry Journal Staff

No Comments

According to a press release sent out last week, Complex Biotech Discovery Ventures (CBDV) has expanded their testing capabilities considerably with the new addition of a vapor/smoke analyzer. CBDV is a licensed cannabis and psilocybin research laboratory embedded in the University of British Columbia, led by CEO Dr. Markus Roggen.

Dr. Markus Roggen, Founder of Complex Biotech Discovery Ventures (CBDV)

The ability to analyze vapor and smoke is a relatively novel concept for the cannabis space, but has been utilized by the tobacco industry for years now. In the early days of adult-use cannabis legalization in the United States, stringent testing regulations for contaminants like pesticides were adopted out of a fear for what would happen when consumers ingest toxic levels of contaminants.

One of the common refrains iterated throughout the industry over the past ten years was that there just wasn’t enough research on how different contaminants affect patients and consumers when burned and inhaled. We still don’t know too much about what happens when someone smokes a dangerous pesticide, such as myclobutanil. Beyond just contaminants, the new technology allows for companies to measure precise levels of cannabinoids in vapor and smoke, getting a more accurate reading on what cannabinoids are actually making it to the end user.

This new development coming from our neighbor to the north could lead to a breakthrough in the cannabis lab testing and research space. CBDV claims they can now analyze cannabis material with a much more in-depth analysis than basic compliance testing labs. The new technology for analysis of smoke, vapor, plant material and formulations allows companies to thoroughly understand their materials in each stage of the product formulation process, all the way to product consumption.

Beyond just smoke and vapor analysis CBDV also offers NMR spectroscopy, metabolomics, nanoparticle characterization, computational modeling and other testing services that go far beyond the traditional compliance testing gamut.

“Our new services offer comprehensive insights into plant material, extracts, end-products and even the smoke/vapor by using state-of-the-art analytical instruments,” says Dr. Roggen. “By understanding the chemical fingerprint of the material, cannabis producers can eliminate impurities, adjust potencies, and optimize extraction processes before wasting money and resources on producing inconsistent end products. As a chemist I am really excited about adding NMR and high-res mass spectroscopy to the cannabis testing offerings.”

January 25, 2021

The Craft of Extraction: Like Beer Making, It’s All About Control

By Jeremy Diehl

No Comments

Any brewmaster from the more than 7,000 U.S. craft breweries will tell you one of two things: That their art is a science, or that their science is an art. The answer might depend upon the brewer’s individual approach, but a combination of experience, process, precise measurement and intuition is exactly what’s required to create great beer. In a very similar way, the cannabis industry has its own version of the brewmaster: Extraction technicians.

A cannabis extraction technician deploys knowledge from multiple science disciplines to apply industrial solvents, heat and pressure to plant matter through a variety of methods with the aim to chemically extract pure compounds. Extraction techs use their passion for the cannabis and hemp plants, combined with chemistry, physics, phytobiology and chemical engineering to help create a result that’s not quite art, but not quite completely science. By manipulating plant materials, pressure, heat and other variables, the extraction technician crafts the building block for what will become an edible, tincture or extract.

Similarly, brewmasters use their knowledge of multiple science disciplines like chemistry and microbiology, as well as different brewing processes and a variety of ingredients to develop creative recipes that result in consistent, interesting beers. The brewmaster’s work is both science and art, as well. And they also manipulate plant materials, pressure, heat and other variables to achieve their desired results.

Author Jeremy Diehl collects cannabis extract from equipment for testing

“I would certainly consider brewing to be an art and a science, but it takes a very disciplined approach to create consistent, yet ever evolving beers for today’s craft market,” says Marshall Ligare, PhD. Research Scientist at John I. Haas, a leading supplier of hops, hop products and brewing innovations. “We work to ensure brewers can create something different with every new beer, as well as something that helps create an experience as well as a feeling.”

In both brewing and extraction, the art comes in the subjective experience of the craftsman and his or her ability to curate the infinite possibilities inherent in each process. However, both are a science in their requirement of establishing production methodologies that guarantee a consistent, reliable product experience every time to win customer loyalty (and regulatory compliance). In the same way hops determine recipes for beer flavors, the cannabis plant determines extraction recipes, especially considering the role that terpenoids play in the quality, flavor and effects of the end product.

The development of new and appealing cannabis products is beginning to mimic the vast variety of craft beers now found all over the world. In the same way beer connoisseurs seek out the perfect stout, lager or IPA, discriminating cannabis consumers now search for that gem of a single-origin, specialty-strain vaporizer oil or irresistible dab extract.

“I see an exciting new day for quality-focused, craft extraction that tells a story, not only of where the cannabis plant might have been grown and how, but also the care that was taken in the processing of that strain into smokable or edible oil,” says John Lynch, Founder of TradeCraft. “Imagine the impact in the marketplace when product-makers figure out how to do seasonal one-offs where engaged connoisseurs are willing to pay a premium for the art behind limited releases.”

In the same way hops determine recipes for beer flavors, the cannabis plant determines extraction recipes

In either process, you’re essentially creating art with science. Each process works with different strains. Each is concerned with chemical and flavor profiles. Each has its own challenges. In both worlds, quality depends upon consistency. You’re creating art, but you need to replicate that art over and over – which can only occur with strict control of the process. Brewmasters seek control of things like yeast quantity and health, oxygen input, wort nutritional status and temperature, among other things. In their pursuit, extraction technicians seek to control temperature, pressure and flow rate–as well as all the ways these variables interact with each other. What enables this control in both efforts is the equipment used to achieve results.

“A modern brewhouse is very much like a scientific laboratory,” Ligare says. “Brewers treat their setup with the same care and attention a scientist gives to their lab equipment, and are equally concerned with precision, cleanliness and the purity of the result. With each new beer, they want to develop a process that can be controlled and replicated.”

The key to creating a precise process is to use instrument-grade extraction machinery that performs to specifications – and allows you to repeat the process again and again. The value of using high-quality instrumentation to manage and monitor either the brewing or extraction process cannot be overstated. Although it seems counterintuitive, this is where the “craft” comes into play for both brewing and cannabis extraction. Precise instrumentation is what allows the brewer or extraction “artist” to manipulate and monitor the conditions required to meet recipe standards. Along with the quality of the ingredients (hops, cannabis, hemp, etc.), the quality of the equipment utilized to create the product is one critical element impacting the end result. “Imagine the impact in the marketplace when product-makers figure out how to do seasonal one-offs where engaged connoisseurs are willing to pay a premium for the art behind limited releases.”

In cannabis extraction, a second crucial decision is determining which solvent is the best solution for the recipe you’re using and the end result you’re hoping to achieve. This decision is a part of the “craft” of extraction, and determined according to a combination of criteria. There’s no question that each solvent has a business case it serves best, and there is ongoing debate about which approach is best. But overwhelmingly, the solvent that best serves the most business needs is CO₂ due to its inherent versatility and ability to have its density tuned to target specific compounds.

“Control is what makes or breaks any craft product,” says Karen Devereux, Vice President of Northeast Kingdom Hemp. “We’re based in Vermont and love how Vermont is known for its quality craft beer, cheese and maple syrup. We wanted to bring that craft approach to hemp extraction, and everyone knows that any craft endeavor is focused on the details and getting them right again and again. You can’t do that without controlling every aspect of the process.”

Greater control of the process can also open up worlds of discovery. The inherent “tunability” of CO₂ enables the extraction technician to target specific compounds, enhancing the potential for experimentation and even whimsy. This can lead to entirely new products much in the way a brewer can control his process to create new, interesting beers.

American portrait photographer Richard Avedon famously declared that art is “about control,” describing the artistic process as “the encounter between control and the uncontrollable.” The same can be said for beer making and cannabis extraction. The more precisely you can control variables, the more options you’ll have for yourself and your customers. The more choices you’ll have with regard to different recipes and products. And the more loyalty you’ll ultimately generate among fans of your products.

January 7, 2021

Soapbox

Break Up Vertical Integration

By Ryan Douglas

No Comments

Editor’s Note: This is an excerpt from chapter ten of From Seed to Success: How to Launch a Great Cannabis Cultivation Business in Record Time by Ryan Douglas. Douglas is founder of Ryan Douglas Cultivation, a cannabis cultivation consulting firm. He was Master Grower from 2013-2016 for Tweed, Inc., Canada’s largest licensed producer of medical cannabis and the flagship subsidiary of Canopy Growth Corporation.

Cultivation businesses should consider specializing in just one stage of the cannabis cultivation process. The industry has focused heavily on vertical integration, and some regulating bodies require licensees to control the entire cannabis value chain from cultivation and processing to retail. This requirement is not always in the best interest of the consumer or the business, and will likely change as the industry evolves. Not only will companies specialize in each step of the value chain, but we’ll see even further segmentation among growers that choose to focus on just one step of the cultivation process. Cannabis businesses that want to position themselves for future success should identify their strengths in the crop production process and consider specializing in just one part.

Ryan Douglas, former Master Grower for Tweed and author of From Seed to Success: How to Launch a Great Cannabis Cultivation Business in Record Time

Elsewhere in commercial horticulture, specialization is the norm. It is unlikely that the begonias you bought at your local garden shop spent their entire life inside that greenhouse. More likely, the plant spent time hopping between specialists in the production chain before landing on the retail shelf. One grower typically handles stock plant production and serves as a rooting station for vegetative cuttings. From there, rooted cuttings are shipped to a grower that cares for the plants during the vegetative stage. Once they’re an appropriate height for flowering, they’re shipped to the last grower to flower out and sell to retailers.

Cannabis businesses should consider imitating this model as a way to ensure competitiveness in the future. In the US, federal law does not yet allow for the interstate transport of plants containing THC, but the process can be segmented within states where vertical integration is not a requirement. As we look ahead to full federal legalization in the US, we should anticipate companies abandoning the vertical integration model in favor of specialization. In countries where cannabis cultivation is federally legal, entrepreneurs should consider specialization from the moment they begin planning their business.

Cultivators that specialize in breeding and genetics could sell seeds, rooted cuttings, and tissue culture services to commercial growers. Royalties could provide a recurring source of income after the initial sale of seeds or young plants. Contracting propagation activities to a specialist can result in consistently clean rooted cuttings that arrive certified disease-free at roughly ¼ the cost of producing them in-house. This not only frees up space at the recipient’s greenhouse and saves them money, but it eliminates the risks inherent in traditional mother plant and cloning processes. If a mother plant becomes infected, all future generations will exhibit that disease, and the time, money, energy, labor, and space required to maintain healthy stock plants is substantial. Growers that focus on large scale cultivation would do well to outsource this critical step.

Intermediary growers could specialize in growing out seeds and rooted cuttings into mature plants that are ready to flower. These growers would develop this starter material into healthy plants with a strong, vigorous root system. They would also treat the plants with beneficial insects and inoculate the crop with various biological agents to decrease the plant’s susceptibility to pest and disease infestations. Plants would stay with this grower until they are about six to 18 inches in height—the appropriate size to initiate flowering.

The final stage in the process would be the flower grower. Monetarily, this is the most valuable stage in the cultivation process, but it’s also the most expensive. This facility would have the proper lighting, plant support infrastructure, and environmental controls to ensure that critical grow parameters can be tightly maintained throughout the flowering cycle. The grower would be an expert in managing late-stage insect and disease outbreaks, and they would be cautious not to apply anything to the flower that would later show up on a certificate of analysis (COA), rendering the crop unsaleable. This last stage would also handle all harvest and post-harvest activities—since shipping a finished crop to another location is inefficient and could potentially damage the plants.

As the cannabis cultivation industry normalizes, so, too, will the process by which the product is produced. Entrepreneurs keen on carving out a future in the industry should focus on one stage of the cultivation process, and excel at it.

October 13, 2020

UT-Arlington and UT-El Paso to Evaluate Phytochrome Manipulation in Hemp

By Cannabis Industry Journal Staff

No Comments

The Collaborative Laboratories for Environmental Analysis and Remediation (CLEAR) at the University of Texas at Arlington (UT-Arlington) and the University of Texas at El Paso (UT-El Paso) has begun collaborating with Curtis Mathes Grow Lights (CMGL), a subsidiary of the Curtis Mathes Corporation, and the hemp genetics company ZED Therapeutics. The research will involve characterizing the phytochemical effects of phytochrome manipulation using various LED horticultural lights of differing light spectrum, and novel high-yielding varietals of hemp. All of the hemp plants will be grown by renowned geneticists Adam Jacques, Christian West, and Oriah Love of ZED Therapeutics under the CMGL Harvester LED lights at their Oregon facility. Drs. Kevin Schug and Zacariah Hildenbrand will oversee the analysis of the corresponding samples for the expression of terpenes, flavonoids, and other classes of therapeutic compounds. The expression of 15 primary cannabinoid species will be performed concurrently by Matthew Spurlock of ZED Therapeutics.

“Since its inception, CLEAR has focused almost exclusively on improving environmental stewardship in the energy sector. It is nice to now diversify into the horticultural industry to better understand how chemically-diverse plants like hemp respond to different environmental-friendly LED lights,” says Professor Kevin Schug, Shimadzu Distinguished Professor of Analytical Chemistry and co-founder and the Director of CLEAR.

Hemp has recently garnered significant attention in the mainstream media as a result of the medicinal benefits of its primary natural constituent, CBD. The collaboration amongst UT-Arlington, UT-El Paso, CMGL and ZED Therapeutics is designed to better understand how the variable of light can influence the expression of other medicinal elements.

“We are incredibly excited about our growing collaborations with UT-Arlington, UT-El Paso, and ZED Therapeutics,” says CMGL’s COO, Robert Manes, “This particular research exploring phytochrome manipulation in hemp may unlock new lighting protocols whereby the modulation of different wavelengths is associated with the expression of different phytochemical profiles.”

This research also has the potential to discover novel molecules that may be present in the ZED Therapeutic hemp varietals using high-resolution exploratory instruments that are unique to the laboratories of CLEAR, such as Liquid Chromatography Quadrupole Time-of-Flight Mass Spectrometry (LC-QTOF-MS).

“We are always searching for new ways to expand our genetic catalogue and it will be interesting to see what sort of effects light modulation have on cannabinoid, terpene, and flavonoid expression,” says Adam Jacques of ZED Therapeutics, “Phytochrome manipulation, and any resulting epigenetic effects, is a poorly understood principle of horticulture and we see a significant opportunity with this research to unearth new knowledge.”

“Hemp is a unique plant both in its light spectrum adaptation and the wide range of phytochemicals it can potentially produce,” says Christian West of ZED Therapeutics, “I’ve been waiting my whole career to be a part of this research and having the lighting knowledge of CMGL combined with the analytical power of UT-Arlington and UT-El Paso is priceless in expanding our understanding of the plant.”

September 9, 2020

CBD Industry Caught Between Regulators & Law Enforcement

By Gregory S. Kaufman

No Comments

The consumer-facing CBD industry operates in a regulatory gray zone even as it grows in prominence. Illegal to market as an unapproved drug, dietary supplement or food additive under the Food, Drug & Cosmetic Act, nevertheless, the CBD industry has flourished with ingestible products widely available. With the increased consumer interest in CBD, headwinds in the form of mislabeled or contaminated products and unsubstantiated therapeutic claims, combined with regulatory uncertainty, continue to be a drag on legitimate market participants and consumer perception of CBD products. The regulation of hemp-derived CBD falls under the purview of the Food and Drug Administration (FDA) and its charge to protect the public health. Despite having jurisdiction to regulate CBD products, the FDA has done little to bring regulatory certainty to the CBD marketplace. However, the FDA, with the assistance of the National Institute of Standards and Technology (NIST), recently took important steps that can be described as “getting their ducks in a row” for the eventual regulation of hemp-derived CBD in consumer products. Always looming is the threat of criminal enforcement of the Controlled Substances Act (CSA) by the Department of Justice’s Drug Enforcement Administration (DEA) for plants and products not meeting the definition of hemp.

Prior to July 2020, the FDA’s regulation of the CBD industry was limited to a public hearing, data collection, an update report to Congress on evaluating the use of CBD in consumer products, and issuing warning letters to those marketing products for treatment of serious diseases and conditions. The FDA recognizes that regulatory uncertainty does not benefit the Agency, the industry or consumers and, therefore, is evaluating a potential lawful pathway for the marketing of CBD products. In furtherance of this effort, the FDA took several recent actions, including:

Producing a CBD Testing Report to Congress¹
Providing draft guidance on Quality Considerations for Clinical Research²
Sending a CBD Enforcement Policy to the Office of Management and Budget for pre-release review and guidance³

Not to be overlooked, the NIST announced a program to help testing laboratories accurately measure compounds, including delta-9 tetrahydrocannabinol (THC) and CBD, in marijuana, hemp and cannabis products, the goal being to increase accuracy in product labeling and to assist labs in identifying THC concentrations in order to differentiate between legal hemp and federally illegal marijuana. These actions appear to be important and necessary steps towards a still be to determined federal regulatory framework for CBD products. Unfortunately, a seemingly innocent interim final rule issued by the DEA on August 21, 2020 (Interim Final Rule), may prove to be devastating to hemp processors and the CBD industry as a whole.⁴ While the DEA describes its actions as merely conforming DEA regulations with changes to the CSA resulting from the 2018 Farm Bill, those actions may make it exceedingly difficult for hemp to be processed for cannabinoid extraction without violating the CSA in the process.

FDA Report to Congress “Sampling Study of the Current Cannabidiol Marketplace to Determine the Extent That Products are Mislabeled or Adulterated”

On July 8, 2020, the FDA produced a report to the House and Senate Committees on Appropriations detailing the results of a sampling study to determine the extent to which CBD products in the marketplace are mislabeled or adulterated. The study confirmed what the FDA, Congress and the marketplace already knew – that in this regulatory vacuum, there are legitimate concerns about the characteristics of consumer CBD products. These concerns include whether products contain the CBD content as described in the label, whether products contain other cannabinoids (including THC) and whether products were contaminated with heavy metals or pesticides. With these concerns in mind, the FDA tested 147 CBD and hemp products purchased online for the presence of eleven cannabinoids, including determinations of total CBD and total THC, and certain heavy metals. The key tests results included the following:

94% contained CBD
2 products that listed CBD on the label did not contain CBD
18% contained less than 80% of the amount of CBD indicated
45% contained within 20% of the amount listed
37% contained more than 20% of the amount of CBD indicated
49% contained THC or THCA at levels above the lowest concentration that can be detected
Heavy metals were virtually nonexistent in the samples

The structure of cannabidiol (CBD), one of 400 active compounds found in cannabis.

Due to the limited sample size, the FDA indicated its intention to conduct a long-term study of randomly selected products across brands, product categories and distribution channels with an emphasis on more commercially popular products. In furtherance of this effort, on August 13, 2020, the FDA published a notice soliciting submissions for a contract to help study CBD by “collecting samples and assessing the quantities of CBD and related cannabinoids, as well as potential associated contaminants such as toxic elements, pesticides, industrial chemicals, processing solvents and microbial contaminants, in foods and cosmetics through surveys of these commodities.”⁵

Even though this report was not voluntarily produced by the FDA, rather it was required by Congress’ Consolidated Appropriations Act of 2020, it importantly solidified a basis for the need for regulation. With less than half of the products tested falling within the 20% labeling margin of error, this suggests rampant and intentionally inaccurate labeling and/or significant variability in the laboratory testing for cannabinoids.

NIST Program to Help Laboratories Accurately Measure Compounds in Hemp, Marijuana and Cannabis Products

Proper labeling of cannabinoid content requires reliable and accurate measurement of the compounds found in hemp, marijuana and cannabis products. As part of NIST’s Cannabis Quality Assurance Program, NIST intends to help labs produce consistent measurement results for product testing and to allow forensic labs to distinguish between hemp and marijuana.⁶ As succinctly stated by a NIST research chemist, “When you walk into a store or dispensary and see a label that says 10% CBD, you want to know that you can trust that number.” Recognizing the lack of standards due to cannabis being a Schedule I drug for decades, NIST intends to produce standardized methods and reference materials the help labs achieve high-quality measurements.

NIST’s efforts to provide labs with the tools needed to accurately measure cannabis compounds will serve as an important building block for future regulation of CBD by the FDA. Achieving nationwide consistency in measurements will make future FDA regulations addressing CBD content in products achievable and meaningful.

FDA Industry Guidance on Quality Considerations for Clinical Research on Cannabis and Cannabis-Derived Compounds

On July 21, the FDA released draft guidance to the industry addressing quality considerations for clinical research of cannabis and cannabis-derived compounds related to the development of drugs. These recommendations are limited to the development of human drugs and do not apply to other FDA-regulated products, including food additives and dietary supplements. However, by indicating that cannabis with .3% or less of THC can be used for clinical research and discussing testing methodologies for cannabis botanical raw material, intermediaries and finished drug products, the FDA is potentially signaling to the consumer-facing CBD industry how the industry should be calculating percentage THC throughout the product formulation process.

While testing of botanical raw material is guided by the USDA Interim Final Rule on Hemp Production,⁷ the FDA warns that manufacturing processes may generate intermediaries or accumulated by-products that exceed the .3% THC threshold and may be considered by the DEA to be Schedule I controlled substances. This could be the case even if the raw material and finished product do not exceed .3% THC. The FDA’s guidance may eventually become the standard applied to regulated CBD products in a form other than as a drug. However, through its guidance, the FDA is warning the CBD industry that the DEA may also have a significant and potentially destructive role to play in the manufacturing process for CBD products.

FDA Submits CBD Enforcement Policy Guidance to the White House

On July 22, 2020, the FDA submitted to the White House Office of Management and Budget a “Cannabidiol Enforcement Policy – Draft Guidance for Industry” for its review. The contents of the document are not known outside of the Executive Branch and there is no guarantee as to when, or even if, it will be released. Nevertheless, given the FDA’s interest in a legal pathway forward for CBD products, the submission is looked upon as a positive step forward. With this guidance, it is important to remember that the FDA’s primary concern is the safety of the consuming public and it continues to collect data on the effects of ingestible CBD on the human body.

It is doubtful that this guidance will place CBD products in the dietary supplement category given the legal constraints on the FDA and the lack of safety data available to the FDA. The guidance likely does not draw distinctions among products using CBD isolate (as found in Epidiolex), full or broad spectrum hemp extract, despite the FDA’s expressed interest in the differences between these compositions.⁸ Instead, the FDA is more likely to establish guardrails for CBD ingestible products without authorizing their marketing. These could include encouragement of Good Manufacturing Practices, accuracy in labeling, elimination of heavy metal and pesticide contamination, and more vigorous enforcement against marketing involving the making of disease claims. The FDA is not expected to prescribe dosage standards, but may suggest a maximum daily intake of CBD for individuals along the lines of the U.K.’s Food Standards Agency guideline of a maximum of 70 mg of CBD per day.⁹

Identifying concerns in the current marketplace; promoting accuracy in testing; highlighting the line between FDA regulation and DEA enforcement; and proposing guidance to the industry all appear to be signs of substantial progress on forging a regulatory path for ingestible CBD products.

The DEA’s Interim Final Rule Addressing Derivatives and Extracts Could Have a Devastating Impact on the Cannabinoid Industry

The seemingly benign Interim Final Rule published by the DEA in August with the stated intent of aligning DEA regulations with the changes to the CSA caused by the 2018 Farm Bill’s definition of hemp could cut the legs out from under the hemp-derived CBD industry.¹⁰ Claiming it has “no discretion with respect to these amendments,” the DEA rule states that “a cannabis derivative, extract, or product that exceeds the 0.3% delta-9 THC limit is a schedule I controlled substance, even if the plant from which it was derived contained 0.3% or less delta-9 THC on a dry weight basis.”¹¹ Under this interpretation of the 2018 Farm Bill language and the CSA, it is unclear whether processors of hemp for cannabinoid extraction would be in possession of a controlled substance if, at any time, a derivative or extract contains more than 0.3% delta-9 THC even though the derivative or extract may be in that state temporarily and/or eventually falls below the 0.3% threshold when included in the final product. It would not be unusual for extracts created in the extraction process to exceed 0.3% delta-9 THC in the course of processing cannabinoids from hemp.

The implications of the rule may have a chilling effect on those involved in, or providing services to, hemp processors. It is known, as revealed by the Secretary of the USDA to Congress, that the DEA does not look favorably on the legalization of hemp and development of the hemp industry. The DEA’s position is that the rule merely incorporates amendments to the CSA caused by the 2018 Farm Bill’s definition of hemp into DEA’s regulations. In doing so, the DEA made explicit its interpretation of the Farm Bill’s hemp provisions that it presumably has held since the language became operative. What is not known is whether this changes the DEA’s appetite for enforcing the law under its stated interpretation, which to date it has refrained from doing. Nevertheless, the industry is likely to respond in two ways. First, by submitting comments to the Interim Final Rule, which will be accepted for a 60-day period, beginning on August 21, 2020. Anyone concerned about the implications of this rule should submit comments by the deadline. Second, by the filing of a legal challenge to the rulemaking on grounds that the rule does not correctly reflect Congressional intent in legalizing hemp and, consequently, the rulemaking process violated the Administrative Procedure Act. If both fail to mitigate harm caused to the CBD industry, the industry will have to look to Congress for relief. In the meantime, if the hemp processing industry is disrupted by this rule, cannabis processors holding licenses in legal states may be looked upon to meet the supply needs of the CBD product manufacturers.

The Interim Final Rule also addresses synthetically derived tetrahydrocannabinols, finding them to be Schedule I controlled substances regardless of the delta-9 THC content. This part of the rule could impact the growing market for products containing delta-8 THC. While naturally occurring in hemp in small quantities, delta-8 THC is typically produced by chemically converting CBD, thereby likely making the resulting delta-8 THC to be considered synthetically derived.

The hemp-derived cannabinoid industry continues to suffer from a “one step forward, two steps back” syndrome. The USDA’s highly anticipated Interim Final Rule on hemp production (released Oct. 31, 2019) immediately caused consternation in the CBD industry, and continues to, due to certain restrictive provisions in the rule. Disapproval in the rule is evident by the number of states deciding to operate under their pilot programs for the 2020 growing season, rather than under the conditions of the Interim Final Rule.¹² With signs of real progress by the FDA on regulating the CBD products industry, yet another interim final rule could undercut the all-important processing portion of the cannabinoid supply chain by injecting the threat of criminality where there is no intent by processors to violate the law. It is not a stretch to suggest that both the USDA and FDA are being significantly influenced by the DEA. The DEA’s Interim Final Rule is just another troubling example of the legal-illegal dichotomy of cannabis that continues to plague the CBD industry.

References

U.S. Food & Drug Admin., Report to the U.S. House Committee on Appropriations and the U.S. Senate Committee on Appropriations, Sampling Study of the Current Cannabidiol Marketplace to Determine the Extent That Products are Mislabeled or Adulterated (July 2020).
U.S. Food & Drug Admin., Cannabis and Cannabis-Derived Compounds Quality Considerations for Clinical Research: Guidance for Industry(July 2020).
U.S. Food & Drug Admin., Cannabidiol Enforcement Policy: Draft Guidance for Industry (July 2020).
Implementation of the Agriculture Improvement Act of 2018, 85 FR 51639 (Aug. 21, 2020) (to be codified at 21 C.F.R. §§ 1308, 1312).
U.S. Food & Drug Admin., Collection and Analysis of Products Containing CBD and Cannabinoids, Notice ID RFQ_75F40120R00020 (Aug. 13, 2020).
Nat’l Inst. of Standards and Tech., NIST to Help Labs Achieve Accurate THC, CBD Measurements (July 21, 2020).
Agricultural Improvement Act of 2018, Pub. L. 115-334, title X, 10113 (codified at 7 U.S.C. §§ 1639o-1639s).
U.S. Food & Drug Admin., Report to the U.S. House Committee on Appropriations and the U.S. Senate Committee on Appropriations, Cannabidiol (CBD), p. 14 (March 2020).
U.K. Food Standards Agency, Food Standards Agency Sets Deadline for the CBD Industry and Provides Safety Advice to Consumers (Feb. 2020) at https://www.food.gov.uk/news-alerts/news/food-standards-agency-sets-deadline-for-the-cbd-industry-and-provides-safety-advice-to-consumers.
See supra n. 4.
Id.
U.S. Dept. of Agriculture, Status of State and Tribal Hemp Production Plans for USDA Approval (as of Aug. 26, 2020).

June 8, 2020

The Top 4 Things Cultivation Directors Should Discuss With Their Operations Manager Right Now

By Lucas Targos

No Comments

Communication is key for efficient interaction between cultivation and business functions at any cannabis operator. So, what are the top four things cultivation directors should be discussing with their operations manager right now, as we face an uncertain Summer 2020 and unique COVID-related challenges (product demand uncertainty, reduced workforce, and immediate response to problems and issues):

Labor requirements
- Operators should be discussing “Who, and what, do I need to operate this facility and how do I make operations more streamlined without diminishing quality, consistency, and yield?”
- Efficient operations should focus on labor workflow and circulation and document a clear understanding of how employees will move through the spaces while doing their jobs.
- Having a “less labor” philosophy and understanding—a ‘first in and first out’ mentality—drives down cost of production.
- By limiting employees’ need to cross paths and segregating processes (e.g. harvest, distro, packaging) in a facility, you can maintain biosecurity and limit the risks of cross-contamination
- When working with fewer staff members, everyone should be trained to:
  A greenhouse facility that urban-gro helped bring to operation.
  - Operate all necessary equipment
  - Perform keys tasks like nutrient deliver or preventative maintenance
Supply chain
- What sort of products do I use to cultivate, process, distribute and how will potential shortages affect my use/cost related to these?
  - Consider products and supplies that you can order in bulk
  - Examine and update your chemical regime to focus on products that are cheaper to freight ship, and located within the US or even your state
  - Mitigate the risk of availability by using products that are have no shelf-life or expiration issues, and those where the supply chain has not yet had disruptions
Automation and technology
- What’s the availability to allow for remote monitoring and controls?
  - Cultivators can take some of the load off the reduced staff by automating critical tasks
  - Remote monitoring solutions will also allow for faster notification of crop issues
  - Integrating preventative maintenance tasks like equipment schedules and maintenance can increase efficiency
Yield expectations
- Ensure that conversations on yield expectations are as transparent as possible and set realistic and achievable goals
- Build business models based on the correct numbers that take into account productions numbers on ‘high yield’ genetics versus lower-yielding plants (yield versus price)
- Ensure you have a detailed plan that combines both plant density and production goals

May 12, 2020

Kaycha Labs Named Designated Lab for Florida’s Hemp Program

By Cannabis Industry Journal Staff

No Comments

Last week, Kaycha Labs, a cannabis testing laboratory company based in Florida, announced that they have executed an agreement with the Florida Department of Agriculture & Consumer Services (FDACS) to be the first “Designated Compliance Laboratory” for the state of Florida’s new hemp program.

As part of the agreement, Kaycha Labs will be procuring samples for the mandatory compliance testing program, as well as providing the required potency analysis for the Division of Plant Industry (an office under the FDACS).

The USDA recently approved the hemp program under the FDACS, and with that comes a host of regulations that producers need to follow.

Florida’s program requires a “designated approved representative” to go out in the field and collect compliance samples for testing from hemp licensees. Those samples then get tested to ensure they have less than 0.3% THC, per state and federal requirements.

Cynthia Brewer, vice president of Kaycha Labs, says this new regulatory framework will help a lot of stakeholders. “I am thrilled that Florida has created a regulatory framework that incorporates both well-defined procedures and high standards,” says Brewer. “Everyone benefits – consumers are protected and hemp producers become known for as- advertised, quality product. All of us at Kaycha are looking forward to working with both and the cultivators and the Department of Plant Industry.”

March 31, 2020

The Beginner’s Guide to Integrated Pest Management

By David Perkins

2 Comments

Formulating a Plan

In this article you will learn how to control pests and improve the health of your cannabis plants using integrated pest management, commonly referred to as IPM. This involves a multi-point strategy – there is no quick fix, nor is there one solution that will wipe out all your pest problems. Proper pest management requires patience, consistency and determination.

It is important to understand that not all pesticides are bad. While many are incredibly harmful not only to pests, but also humans, in this article I will educate you about some of the safer alternatives to traditional pesticides. It is possible to safely control unwanted pests in your cannabis garden without harming yourself, your employees or the natural habitat around you.

Every cultivation facility should have a well-thought-out plan for their pest management program. This program should account for the prevention, and if necessary, eradication of: spider mites, russet mites, fungus gnats, root aphids, thrips and caterpillars. These are just a few of the more common pests you’ll find in a cannabis garden. There could also be many other less commonly known bugs, so you have to be vigilant in looking closely at your plants, and the soil, at all times. Complete eradication of a targeted pest can be difficult. Once a pest has established itself, decimating or decreasing the population will require an aggressive regimen that includes spraying daily to control populations and prevent other pests from getting established.

Spraying or applying pesticides to the foliage of plants isn’t the only way to control or eradicate pest populations. There are many other ways that you can minimize the spread of pests without the use of pesticides. In greenhouse and outdoor grows, growing specific types of plants around the cultivation area will attract both beneficial and predator bugs that will naturally control pest populations. Some plants that attract these bugs are: mint, peppers, and marigold. Beneficial and predator bugs, such as ladybugs, predator wasps and predator mites, can control unwanted pest populations in the area before they even have a chance to become a problem in your garden. Plants and flowers that attract bees, birds and insects will also create helpful bio- diversity, making it more difficult for the unwanted pests to thrive.

For indoor cultivation, it is imperative that you have your cultivation facility set up for a proper workflow. If you already have pests, you need to make sure you are not contaminating the rest of your facility when going from one area to the next. Make sure that you only go to contaminated areas at the very end of your day, and when you’re done working in that area, you must immediately exit the building. Do not ever walk back through the uncontaminated parts of your facility or the pests will spread quickly.

When most people think of pests in their cannabis garden they think of the more common varieties: spider mites, russet mites, aphids and thrips. However, there are also soil-dwelling pests that can exist, without your knowledge. These will decrease the health and vigor of your plants, without you even knowing they’re there, if you’re not careful to check for them. Some of the soil dwelling pests that plague cannabis plants are: root aphids, fungus gnat larvae and grubs. It is just as important to control the pests below the soil, feeding on your roots, as it is to control the pests that feed above soil on your plants.

Maintaining healthy plants is essential to controlling pest populations, both on the foliage and below the soil. Healthy plants will have an easier time fighting off pests than unhealthy plants. Plants have immune systems just like humans, and the stronger the plant’s immune system, the more likely it will be able to ward off pests and diseases. Allowing a plant to reach its full potential, by minimizing pests, means your plants will also have a better quality, smell and flavor, not to mention a bigger yield.

Worker Safety, Regulation and REI times

The application of pesticides requires certification from the state agricultural department. In certain situations, depending on the type of pesticide and method of application, a license may even be required. The application of pesticides without proper certification is against the law. Applying pesticides in a manner that is not in accordance with the label and instructions is also a violation of law.

The proper personal protective equipment (PPE) is required for anybody handling, mixing or applying pesticides. Employees can be a liability to your company if they are applying pesticides improperly. Make sure you and your entire staff are well educated about pesticide use requirements and limitations, prior to usage, and that only a properly certified person is handling the mixing and application at your facility.

The author, David Perkins, In his greenhouse after using insect killing soap.

After a pesticide is applied, you must abide by the re-entry interval (REI). This is the required time period limiting all workers from re-entry into areas where pesticides have been applied. This time period will vary depending on the type of pesticide used and the method of application. In some instances, pesticides applied in the last 30 days may require employee training before work can be done in those areas.

The misuse of or improper handling of pesticides is not only unlawful and dangerous to human health, but can also cause environmental damage to waterways and wildlife. The direct effects of pesticides on wildlife include acute poisoning, immunotoxicity, endocrine disruption, reproductive failure, altered morphology and growth rates and changes in behavior. Pesticides can indirectly impact wildlife through reduction of food resources and refuses, starvation due to decreased prey availability, hypothermia and secondary poisoning. Section 1602 of the California Fish and Game Code governs requirements for permitting of any project where pesticides will be used, and strictly regulates the disposal of all waste and run-off. It is imperative to know the regulations and to abide by them, or heavy fines will ensue!

Using Pesticides in a Regulated Market

Knowing which pesticides you can’t use, to avoid failing mandatory state testing, is just as important as knowing which ones you can use safely to pass required testing. Most states with regulated markets have strict limitations on the pesticides that can be used in cannabis cultivation. Pesticide use in the cultivation of cannabis is the most strictly regulated in the agriculture industry; the pesticides allowed for use in cannabis cultivation are far more limited than any other crop.

Just because a product is certified organic does not mean that it can be used, or that it is safe to be consumed or ingested. Oftentimes when cannabis flower alone is tested it will not fail or show a detectable amount of pesticides or heavy metals. However, when that flower is turned into concentrates, banned substances are then detected in testing, leading to test failures.

Cannabis cultivation facilities that are located on land that was previously used for conventional agriculture, or located near vineyards or other agricultural crops that are heavily sprayed with harmful pesticides, run a very high-risk failing testing. This is because of either spray drift from nearby agriculture, or residual pesticides and heavy metals left in the soil from previous crops that were using pesticides banned for cannabis cultivation. Accordingly, if you’re going to be growing outdoors or in a greenhouse, it is imperative that you get a soil and water test prior to cultivation, so you can determine if there is any potential for test failures due to pesticides or heavy metals in the soil or water in that area.

Proper Application – Using the Right Tools in the Right Way at the Right Time

One of the most important factors in pest management is proper identification of pests and proper application and coverage of pesticides. It does not require an entomology degree to identify insects, these days there is a lot of information online that can help you identify cannabis pests. Proper identification of insects can make the difference between success and failure. With a good eye and a microscope, if you do your research, you can control most insects in your garden.

In order to control pests in your garden you must get proper coverage of the foliage of the plant when you are applying pesticides. There are different types of equipment that are commonly used to apply pesticides in cannabis cultivation: backpack sprayers, foggers, and airless paint sprayers are the most common. An alternative method involves using an automated dosing system such as a dosatron, which injects fertilizer or pesticides at a specific ratio into your water lines, allowing you to use only the exact amount of pesticide you need. That way you avoid wasting money on unused pesticides. It is also safer for employees because it minimizes employee exposure, since there is no mixing required, and it allows for a large volume to be sprayed, without refilling a tank or a backpack sprayer.

No matter what you are using you must ensure you get the proper coverage on your plants in order to control pests. The temperature and humidity of your cultivation area, as well as the PH and temperature of the pesticide solution, all factor into the success of your IPM. For example, PFR 97 needs to be applied at a higher humidity range, around 70% to be most effective. In some areas this is not possible so repeated applications may be required to ensure the application is effective. A high PH or alkaline PH can cause alkaline hydrolysis which will make your pesticide solution less effective and will dictate how long your pesticides remain effective after they are mixed. It is therefore important to use your pesticide solution as soon as you make it; don’t let it sit around for long periods of time before use or it will be less effective.

In cannabis cultivation there are two different primary growth cycles: vegetative and flower. These cycles require different IPM strategies. In general, during the flowering cycle, pesticides should not be applied after the second week, with some limited exceptions i.e. for outdoor cultivation there is a longer window to spray since the flower set takes longer than a plant being grown inside, or in a light deprivation greenhouse, where there is a 12/12 flowering cycle.

Starting with an immaculate vegetation room is crucial to maintaining pest and mold free plants in the flowering cycle.

For the vegetative (non-flowering) cycle, a strict rotation of foliage spray applications targeting not only pests, but also molds and pathogens, will be necessary to avoid a quick onset of infestation. Starting with an immaculate vegetation room is crucial to maintaining pest and mold free plants in the flowering cycle. Preventative sprays that are safe for use include: safer soap (contact kill) for soft bodied chewing insects; Regalia (biological control) for powdery mildew; and PFR 97 (biological control) for soft bodied chewing insects. It is also helpful to spray kelp, which strengthens the cell walls of plants, making the plant healthier, and thus enabling the plant to better defend itself from pests and diseases. Also, Bacillus thuringiensis (Bt) is useful to prevent or kill caterpillars.

The best way to control a pest infestation in the flowering cycle is at the very beginning on day one. You must start aggressively, with a three-way control consisting of a contact kill and preventative during days 1-14; preventative and biological control during days 10-18; and then release predator bugs on day 25, for optimal results. Knocking back the population with an effective contact kill pesticide early on is essential to ultimately lowering populations throughout the grow cycle, so that you can spray a biological control to preclude them from returning, before you release the predatory bugs at the end of the cycle.

Biological controls can take anywhere from 3 to 10 days before they are effective. Biological pesticides are selected strains of bacteria or fungus. When the plant tissue is eaten by a targeted pest, the bacteria kills the pest from the inside providing control without having to spray pesticides repeatedly. Predator bugs are the last line of defense, used in late flowering. They can be used indoors, outdoors and in greenhouses. An example of a common predator bug is Amblyseius californicus used to control low populations of spider mites, but there are many different varieties and they are specific depending on the type of pest population you seek to control.

A common concern with the use of predatory bugs, is whether they will be present when the flowers are harvested. However, if there is no food for the bugs (i.e. pests) the predator bugs will leave in search of food elsewhere. Further, indoor predator bugs are usually very small in size and difficult to see to an untrained eye. It is very unlikely to see any signs of predator bugs near the end of the flowering cycle, or in the finished flower product. Even when using bigger predator bugs, the bugs will leave the plants when harvested and dried.

Having pests can be very stressful. It is not uncommon to have bugs, pests, rodents, animals and birds cause damage in cannabis gardens. Making an informed decision based on science and not on unproven assumptions can determine how successful you are at pest management. There are many factors that go into pest management and no one situation is the same. You must be dedicated and consistent; pest management never stops. You will always have something ready to invade your garden. Prepare, plan, prevent and repeat!