Dr. Goulson’s study provides the public with its first look at Bayer’s own data on the persistence of neonicotinoids in soil. Shockingly, this information shows that the soil half-life of the most commonly used seed treatments can range from 200- 1000 days. In the case of clothianidin, a chemical that Beyond Pesticides and other organizations are suing the Environmental Protection Agency (EPA) to suspend, it is revealed that the chemical has the potential to remain in soil for 6,931 days (nearly 19 years!) before degrading. One study referenced by Dr. Goulson shows that thiamethoxam can persist for nearly 3,000 days. A breakdown product of thiamethoxam is clothianidin; thus, even when these chemicals do begin to degrade, their breakdown products have the potential to be just as toxic as the parent chemical.
I'm thinking,wondering about of the build up after years of use