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MARIJUANA MOMENT

9 IN 10 ILLICIT MARIJUANA SAMPLES CONTAINED PESTICIDES IN ‘STRIKING CONTRAST’ TO
REGULATED PRODUCTS, STUDY FINDS


 * Politics
   
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    * South Dakota Attorney General Releases Final Summary For 2024 Marijuana
      Legalization Ballot Initiative, But Advocates Weigh Litigation Over
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      Is Recommending Marijuana Rescheduling

 * Science & Health
   
    * 9 In 10 Illicit Marijuana Samples Contained Pesticides In ‘Striking
      Contrast’ To Regulated Products, Study Finds
   
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      Cannabis Use Surpass Tobacco Smoking, Gallup Poll Finds
   
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    * Missouri Officials Adopt New Marijuana Testing Rules To Combat ‘Lab
      Shopping’ For THC Potency
   
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      Hiccups And Unregulated Market Are Holding It Back, City Economists Say
   
    * Colorado’s Marijuana Tax Brought In More Revenue Than Alcohol Or
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 * Video
   
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      Combat The Illicit Market
   
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 * Newsletter
   
    * Fed cannabis rescheduling recommendation is in (Newsletter: August 31,
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    * GOP congressman presses DEA for cannabis details (Newsletter: August 25,
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SCIENCE & HEALTH


9 IN 10 ILLICIT MARIJUANA SAMPLES CONTAINED PESTICIDES IN ‘STRIKING CONTRAST’ TO
REGULATED PRODUCTS, STUDY FINDS

Published

3 hours ago

on

August 31, 2023

By

Kyle Jaeger

A new study reveals the “striking contrast” in safety between marijuana grown
for the legal versus illegal markets in Canada, with 92 percent of unregulated
cannabis testing positive for numerous pesticides compared to just six percent
of regulated products.

The study, published in the Journal of Cannabis Research last week, involved
testing 36 marijuana samples from licensed retailers and 24 illicit samples that
were seized by law enforcement. The analysis allowed researchers to see if the
products were grown with or contaminated by any of 327 different pesticides.



For the legal cannabis, the contamination rate was just six percent, with trace
amounts of “only two pesticide residues detected, myclobutanil and dichlobenil.”
The latter pesticide is not among the 96 that are subject to mandatory testing
under Canadian statute.

Pesticides in the illicit market samples, however, were ubiquitous. Ninety-two
percent of the samples contained potentially dangerous chemicals, the study
found, identifying “23 unique pesticide active ingredients with 3.7 different
pesticides identified on average per sample.”

“Chlorpyrifos, imidacloprid, and myclobutanil were measured in illicit samples
at concentrations up to three orders of magnitude above” the method’s lowest
calibrated level of 0.01 μg/g, the study’s authors said. “One illicit sample
alone contained nine different pesticide active ingredients.”



Notwithstanding the six percent of legal samples that contained low amounts of
pesticides, researchers said “the licensed Canadian cannabis sector has greatly
improved.” Prior to mandatory testing requirements in 2019, the contamination
rate stood at around 30 percent.

“To the authors’ knowledge, this study is the only extensive pesticide
multiresidue analysis that compares pesticides in the licenced and illicit
cannabis markets in a nation-wide jurisdiction where cannabis has been
legalised,” authors said. “Albeit being a small study, our results do support
the Government of Canada messaging where ‘Consuming illegal products could lead
to adverse effects and other serious harms. Testing of illegal cannabis has
found contaminants like pesticides and unacceptable levels of bacteria, lead and
arsenic.’”



In other words, the findings affirm what cannabis reform advocates have long
been saying: Regulating marijuana sales gives consumers access to safer
products.

A separate study published last year examined marijuana testing rules in U.S.
state markets and found that the patchwork of laws has caused public confusion
and underscores the “urgent” need for “unified regulatory approach” and
“national-level guideline on the contaminant regulations of cannabis.”

Developing such a national framework is challenging under federal prohibition,
however. The Environmental Protection Agency (EPA) has approved the use of
certain pesticides for hemp after the crop was federally legalized under the
2018 Farm Bill, but it’s declined to do the same for marijuana while it remains
illegal.



Meanwhile, a pair of Republican congressional lawmakers has reintroduced
legislation this session aimed at combatting the use of banned pesticides at
illegal marijuana grows. The bill’s co-sponsor said in March that one effect of
the bill would be to protect the health of consumers—especially medical cannabis
patients.

In 2019, the nonprofit organization Beyond Pesticides urged supporters to
contact their congressional representatives with a letter calling for federal
regulations on pesticides used in marijuana in order to promote public health
and safety.

That year, a rash of vaping-related lung injuries and deaths erupted following
the addition of hazardous additives in vape cartridges. A study later found that
injuries were lower in states with legal marijuana sales and homegrow.

Also in 2019, the federal National Science Foundation awarded a $250,000 grant
to a biotech startup that was developing technology to remove dangerous
pesticides from a variety of crops, including marijuana.

> GOP Congressman Explains Why He’ll Vote For Ohio Marijuana Legalization
> Initiative In November As State Releases Pro And Con Arguments



Photo courtesy of Brian Shamblen.

Marijuana Moment is made possible with support from readers. If you rely on our
cannabis advocacy journalism to stay informed, please consider a monthly Patreon
pledge.
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Don't Miss

MDMA Appears To Reduce ‘Challenging Experiences’ Associated With Psilocybin And
LSD, Study Finds

Kyle Jaeger


Kyle Jaeger is Marijuana Moment's Sacramento-based senior editor. His work has
also appeared in High Times, VICE and attn.



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