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Harold from Linden, Michigan writes

Does a mosquito spray, like Talstar P, affect the honey bee once it dries?

Talstar, Tekko Pro, and BTI, do these or similar chemicals affect the honey bee if sprayed on the flowers or if over spray landed on the flowers they use?


Some insecticides, like Talstar P, can be harmful to beneficial insects such as honey bees. Per Talstar P's label, Talstar "is highly toxic to bees exposed to direct treatment of residues on blooming crops or weeds", so we wouldn't recommend spraying while bees are present or on blooms that bees can later land on. Tekko Pro IGR is just a growth regulator not an insecticide so as long as it's used as directed, it shouldn't harm beneficials. As far as BTI, if you're referring to the BTI Mosquito Dunks, that product is a larvacide and it only goes in water retention sites. If you meant Monterey B.T. Insecticide, the product "has no effect on birds, earthworms or beneficial insects such as honeybees and ladybugs, when used as directed." We recommend to always read the label of the product you decide to use to know how to use it properly and to check how it can affect beneficial insects.

Answer last updated on: 04/07/2017

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