The Black List: Pesticides

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In addition to the tests required under WAC 314-55-10, new testing requirements are being implemented for Medical Cannabis as it comes under the purview of I502. The new section, WAC 246-70-050, requires testing for 13 prohibited pesticides for all flower, trim, leaves, or other plant matter. Concentrates require testing for 15. The Washington State Dept. of Health issued a post on their Medical Marijuana web page naming those black-listed pesticides.We’ve compiled a bit of information on these chemicals here to give you a peek; note that in the info below, “flower” is used as shorthand for “flower, trim, leaves, or other plant matter.” Stay tuned for updates and a look at heavy metals and aflotoxin/mycotoxin testing.

A Pesticide Awareness Network (P.A.N.) “Bad Actor” and Aquatic Toxin…
The Molecule
Common Name: Avermectin B1 (a,b)
Trade Names: Abba, Agri-Flex/Mek, Avicta,
Avid, Dynamec, Reaper
ChemSpider: Abamectin
Required For: Flower, Concentrates

Abamectin, Avid as it is often referred to in the generic, is an insecticide, acaricide and nematicide most commonly used by gardeners and the agriculture industry to fight off mites. Known as a developmental or reproductive toxin in humans, this chemical is highly toxic to aquatic life.

Fire Ants, spider mites, and reproductive toxins…
The Molecule
Common Name: Bifenthrin
Trade Names: Aloft, Athena, Bifenture,
Brigade, Mustang, Talstar Nursery
ChemSpider: Bifenthrin
Required For: Flower, Concentrates

Bifenthrin is a pyrethroid class of chemicals primarily used to combat imported red fire ants, but is used by farmers to fight aphids, gnats, mites, and thrips among other insects. It has been identified as a developmental or reproductive toxin and is a suspected endocrine disruptor. Not only is bifenthrin highly toxic to aquatic organisms, it has the longest half-life in soil of any insecticide currently on the market.

Salting the earth…
Chlormequat Chloride
The Molecule
Common Name: Chloride Salt
Trade Names: Citadel, Cycocel PGR, NuFarm

Chlormequat Chloride
Required For: Flower, Concentrates

Chlormequat Chloride is a chloride salt that acts as a plant growth regulator used in the agriculture industry to control cell elongation in cereal grains. High exposure is known to be a developmental or reproductive toxin in humans and other mammals. It is soluble in water allowing potential groundwater and runoff contamination.

Kids and cancer and Washington Apple Growers…
The Molecule
Common Name: Alar, B-NINE
Trade Names: Alar, B-NINE, Dazide 85,
ChemSpider: Daminozide
Required For: Flower, Concentrates

Daminozide has been illegal to use on U.S. food crops since 1989. A two-year study on exposure and children showed even low levels of consumption resulted in a 240% increase in cancer risk. Another plant growth regulator, it was commonly used in Washington State by apple growers to make harvests easier, who sued for libel after the press reported on it. Even actress Meryl Streep testified in Congress as an expert on the chemical in her urging for organic standards.

A soil penetrating threat to your health…
DDVP (Dichlorvos)
The Molecule
Common Name: Algard
Trade Names: Apavap, Benfos, Cekusan,
Fly-Fighter, No-Pest, Verdisol
ChemSpider Link: Algard
Required For: Flower, Concentrates

Dichlorvos is an organophosphate insecticide, used to attack infestations of aphids, spider mites, thrips, and other insects. When it comes to human risk, the National Institute for Occupational Safety and Health (NIOSH) labels it as, “Immediately Dangerous to Life and Health.” Environmentally, this chemical is a big risk for groundwater contamination; it doesn’t absorb into sediment, allowing it to travel through soil.

Membership to the bee-killing chemical class…
The Molecule
Common Name: Bayer Advanced
Trade Names: Gaucho, Leverage, Marathon,
Merit, Neonic
ChemSpider Link: Imidacloprid
Required For: Flower, Concentrates

Imidacloprid is a systemic insecticide and a member of the neonicotinoids class of chemicals. According to current research, Imadacloprid and other members of its class used in wide-spread agricultural applications may be contributing to honey bee colony collapse in North America and Europe. The E.P.A here in the U.S., as well as Canada’s Pest Management Regulatory Agency consider this chemical to have high potential for surface water run off and ground water leaching.

The Eagle 20 has landed…
The Molecule
Common Name: Myclobutanil
Trade Names: Agristar, Disarm, Eagle 20,
Ferti-Lome, Rally, Spectracide
ChemSpider: Myclobutanil
Required For: Flower, Concentrates

Myclobutanil is a fungicide known recently in the media as the active ingredient in Eagle 20. Another Pesticide Awareness Network (P.A.N.) “Bad Actor” chemical, it is a known reproduction or developmental toxin and a suspected endocrine disruptor. Ecological toxicity is particularly harsh on aquatic organisms and amphibians.

A long-lasting contaminator…
The Molecule
Common Name: PBZ
Trade Names: Andersons Golf, Muskateer, Paczol
Piccolo, Sepro, Trimmit
ChemSpider: Paclobutrazol
Required For: Flower, Concentrates

Paclobutrazol is a fungicide that retards plant growth. Its method reduces internodial growth in a way that thickens stems, increases root growth, encourages early fruiting, and reduces sensitivity to frost. Although it’s not a “Bad Actor” on P.A.N.’s list, it’s impacts on aquatic life is quite harsh. Talk about tenacious: It stabilizes in water-sediment mixtures, with a degradation time to half concentration (DT50) takes nearly 2 years.

The first-line treatment for Scabies, and military uniforms…
The Molecule
Common Name:Permethrin
Trade Names: Ambush, Dragnet, Eksmin,
Qamlin, Torpedo
ChemSpider: Permethrin
Required For: Flower, Concetrates

Permethrin is a common and widely used ingredient in insecticides and insect repellents. The E.P.A. gives it a Class II designation, but it is extremely toxic to fish and cats. It is a neurotoxin and works by slowing down the nervous system through binding sodium channels. What’s the worry with this chemical and cannabis? Human tissue studies indicate it promotes carcinogenic action in nasal mucosal cells when inhaled. It’s also shown up in breast milk.

C’mon, give our fisheries a break…
The Molecule
Common Name: DMI
Trade Names: Banner, Mantis, Juno,
Novel, Restore, Spectator
ChemSpider: Propiconazole
Required For: Flower, Concentrates

Propiconazole is a systemic fungacide that employs an enzyme that stops cellular growth. Although generally cited as moderately low acute toxicity, the E.P.A. studies indicate strong suspicion that it is carcinogenic to humans. Ecologically, it is somewhat mobile in soil and is highly toxic to fish.

A wolf in sheeps clothing…
The Molecule
Common Name: Spinosad
Trade Names: Blackhawk, Bonide, Bulls-Eye,
Elector Bait, Natular, Sluggo
ChemSpider: Spinosad
Required For: Flower, Concentrates

Spinosad is a highly effective broad pest spectrum insecticide made from the isolation of two bits of soil bacteria. It has a low toxicity to mammals, and a good environmental profile. It is approved for use in organic agriculture by numerous national and international certifications as well. While all that seems great, this insecticide is highly toxic to honey bees in both acute and chronic exposure levels. It does a number on the butterfly populations, too.

The Molecule
Common Name: Spiromesifen
Trade Names: Forbid, Judo, Oberon

ChemSpider: Spiromesifen
Required For: Flower, Concentrates

Spiromesifen is a tetronic acid insecticide developed in 2006 by Bayer and used primarily to fight mites and whiteflies. While highly toxic to fish and other non-target insects, acute toxicity from inhalation and skin contact is listed as low risk. Information on this chemical is a bit hard to find; checking datasheets from the regulatory bodies of the E.U. gives more details.

Long lasting carcinogen worry in our water…
The Molecule
Common Name: Uniconazole
Trade Names: Concise, Prunit, Sumagic,
ChemSpider: Uniconazole
Required For: Flower, Concentrates

Uniconazole is an azole class fungicide with growth regulator properties. While the W.H.O. lists acute toxicity risk as “slight,” research indicates it may be a carcinogen with water contamination risks, even earning a spot on the E.P.A.’s carcinogen watch list. In aerobic soil, the half-life of Uniconazole is 583 days.

The pesticide enhancer…
Piperonyl Butoxide
The Molecule
Common Name: PBO
Trade Names: Absorbine, Adams, Anvil,
Diversey, Prozap, Sentry
ChemSpider: Piperonyl Butoxide
Required For: Concetrates

Piperonyl butoxide is an organic compound (a semi-synthesized derivative of safrole) that isn’t a pesticide on its own, but rather is mixed with certain pesticide compounds as a synergist to increase their potency. The E.P.A. designates it as a Class C indicating its potential as a carcinogen.

Don’t inhale…
The Molecule
Common Name: Pyrethrins
Trade Names: Buhach, Ofirmotox, Insect Powder,
Dalmation, Firmotox, Parexan
ChemSpider: Pyrethrins
Required For: Concetrates

Pyrethrins are a class of organic compounds derived from certain members of the Crysanthemum genus. They are particularly potent at attacking the nervous systems of insects. Many consider this an organic pesticide, but that doesn’t mean it’s safe. Chronic toxicity occurs most quickly through inhalation exposure.

7 Comments on “The Black List: Pesticides”

  1. Pingback: Pesticides and Cannabis: Everything You Need to Know

  2. No poison in garden now. But starting to have aphids issues. What pesticides can you recommend?

  3. Wondering if “pylon” miticide and hexagon (eggs mites killer) appears in the pesticides test? Tbank

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