Some fungicides, such as captan, have direct contact toxicity to bees as they have some insecticidal activity in addition to their fungicidal effects. Other fungicides seem to harm bees in more subtle ways. ... Some fungicides can also have indirect effects on bee health.

Will fungicide hurt bees?

Bees and other beneficial insects can be exposed to fungicides directly or through contaminated nectar and pollen in urban and agricultural settings. Fungicides can harm bees in a variety of ways, affecting bee development, behavior, immune health, and reproduction.

Which herbicides are toxic to bees?

One group of insecticides which is highly toxic to honey bees cannot be applied to blooming crops when bees are present without causing serious injury to colonies. Among the materials in this high-risk category are diazinon, Imidan, malathion and Sevin.