Cannabis is a relatively grey area when it comes to pesticide use. Just as the legality of cannabis cultivation in the United States differs at the federal and state level, so too does the legality of pesticide use on cannabis.
At the federal level, no pesticide product is registered for use on cannabis. But at the state level, a region with an internal legal cannabis industry can produce a list of pesticides that it deems safe to use on cannabis, which cultivators can then apply to their crop.
As these lists are continually updated, this system can get even more confusing. If a company were to operate several cultivation facilities in multiple states, there is no guarantee that it would be able to use the same pesticides in every facility.
Pesticide use also carries with it additional complications, such as the possibility that their use might affect the quality of the crop or harm the local environment. Some common pesticides in agriculture have been used to such an extent that insects have become immune to their effects. Pesticide residues can also be tricky to completely remove from cannabis plant material, and even small amounts of these residues may present a health risk to consumers.
In the face of so many complications, some cannabis cultivators are turning an alternative pest control method: biological pest control.
Read more at analyticalcannabis.com