Bifenthrin
Have you ever heard of this insecticide ? Have you ever read of this ingredient on a bag of potting soil? Or do nurseries or large retail stores who sell plants shipped from other states attach a tag listing the chemical/pesticides used while growing a plant that’s on sale in your local retail store?
Generally the answer is NO.
Of course states want to keep crop damaging insects out of their agricultural fields. However, Labeling should be required when Bifenthrin is used to treat the soil of plants shipped across several borders.
Here’s what Ai says about Bifenthrin.
Key Details on Bifenthrin Use in Retail Plants
Source of Treatment: The pesticide is rarely applied by the retail store (e.g., Walmart) itself. Instead, the wholesale nurseries that supply the plants apply it to the potting media (soil) to prevent pests like ants, black vine weevils, and root weevils.
Fire Ant Compliance: Plants shipped from fire-ant quarantined areas (mostly in the Southern US) must be treated with Bifenthrin to meet USDA regulatory requirements.
Long-Term Residue: Bifenthrin is a synthetic pyrethroid known for its long-lasting residual control, which can remain effective in the soil for 3 months or more.
Lack of Labeling: Unlike some, other, or newer regulations regarding neonicotinoids, there is no widespread mandatory labeling requirement for retailers to disclose that plants have been treated with bifenthrin, meaning consumers often purchase them without knowing.
Is Bifenthrin a Restricted Use PesticideYes.
bifenthrin is classified as a Restricted Use Pesticide (RUP) by the EPA due to its high toxicity to fish, aquatic organisms, and bees. It is intended for sale to and use only by certified applicators (Farmers Business Network)
Safety Considerations
Not Systemic: Bifenthrin is generally a contact pesticide, not systemic, meaning it tends to stay in the soil and does not usually translocate into the plant tissues, leaves, or fruits. (JUST DON’T TOUCH YOUR NURSERY PLANT SOIL I’m adding that sentence. It’s not part of the Ai statement.
Generally you don’t know where the plant was grown. Was the plant shipped across state borders? (Added by the poster not part of the Ai statement)
Risks: It is considered highly toxic to aquatic life, even in small concentrations, and is a suspected carcinogen.
Safe Handling: It is highly recommended to remove the top soil from store-bought plants and avoid placing potting soil directly into edible gardens. AI Overview
Key Findings on Bifenthrin from Studies:
Neurotoxicity & Behavior: Studies show bifenthrin affects neurological development, causing hyperactivity in fish larvae and behavioral deficits related to mTOR and ryanodine receptor signaling.
Endocrine Disruption: Identified as an endocrine-disrupting chemical (EDC), it shows high binding affinity to hormone receptors, including progesterone, estrogen, and thyroid receptors.
Health Effects: Exposure has been linked to oxidative stress, DNA damage, and cytotoxicity (cell damage) in studies, including damage to liver and kidney tissues. It has also been associated with reduced male fertility potential.
Environmental Fate: Research indicates that while effective at killing insects, bifenthrin has high stability in soil, with half-lives for biodegradation lasting roughly 12 days to much longer for other degradation pathways.
Developmental Impacts: Research on rat pups showed that exposure can alter startle responses and affect nervous system development.
AI Overview (states where laws allow Bifenthrin to prevent Black Vine Weevils, Ants, Fire Ants, Root Weevils)
Alabama, Alaska, Arizona, Arkansas, California, Colorado, Hawaii, Idaho, Iowa, Kansas, Louisiana, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oregon, Oklahoma, South Dakota, Texas, Utah, Washington, Wisconsin, and Wyoming.
Key details regarding bifenthrin's restricted status:
EPA Classification: Classified as a RESTRICTED USE PESTICIDE (RUP).
Toxicity Risks: Highly toxic to aquatic organisms, fish, and bees.
Applicator Requirements: Requires purchase and use by certified applicators, particularly for agricultural or high-concentration products.
Residential Use: While technical-grade bifenthrin is restricted, many products with low concentrations are approved for residential, homeowner use.
Usage Restrictions: Labels often prohibit application near waterways and have strict guidelines to prevent runoff.
Potential Health Concern: The EPA has classified it as a Category C, "possible human carcinogen". (Farmers Business Network)
Be careful! And remember the law does not require a label stating that Bifenthrin application is on the plant soil.
Try to buy SEEDS and grow your own plants in clean soil.
Other information and states with bans
Key Shipping and Sale Restrictions
Shipping limitations are usually determined by whether a product is registered in that state or if the state classifies it as a Restricted Use Pesticide (RUP).
Restricted States for Homeowners: Retailers often cannot ship many bifenthrin products to homeowners in states like New York, Connecticut, and Vermont.
Registration Requirements: Manufacturers must register their specific formula with each state. If a brand has not registered a particular version of bifenthrin in your state, it cannot be legally sold or shipped there, even if other bifenthrin brands are available.
Usage Prohibitions: Some specific areas have total bans on certain uses. For example, bifenthrin cannot be used on golf courses or sod farms in Nassau or Suffolk County, New York.
California Limitations: While bifenthrin is registered in California, some specific agricultural formulations are not for use in the state.