WHOOOOAAAA! Granted, I'm a noo-bee, but this is a topic I was looking up a couple of weeks back. The only "insecticide" we use is mosquito dunks in rain barrels, and I was looking up if it is safe for bees. The strain used in dunks should be OK. But B. t. aizawai, that one scares me. I believe that's the one that kills bees.
The Bt variety that targets mosquito larva is israelensis.The only "insecticide" we use is mosquito dunks in rain barrels, and I was looking up if it is safe for bees. The strain used in dunks should be OK. But B. aizawai, that one scares me. I believe that's the one that kills bees.
The specific activity of Bt generally is considered highly beneficial. Unlike most insecticides, Bt insecticides do not have a broad spectrum of activity, so they do not kill beneficial insects. This includes the natural enemies of insects (predators and parasites), as well as beneficial pollinators, such as honeybees. Therefore, Bt integrates well with other natural controls. For example, in Colorado, Bt to control corn borers in field corn has been stimulated by its ability to often avoid later spider mite problems. Mite outbreaks commonly result following destruction of their natural enemies by less selective treatments.
1. Ecological Toxicity Data
The Agency concludes that toxicity and infectivity risks due to delta-endotoxin effects to nontarget avian, freshwater fish, freshwater aquatic invertebrates, estuarine and marine animals, arthropod predators/parasites, [HIGHLIGHT] honey bees, annelids and mammalian wildlife will be minimal to nonexistent [/HIGHLIGHT] at the label use rates of registered B. thuringiensis active ingredients.
What I read from that link: