Will diatomaceous earth keep bees from pollinating garden plants such as tomatoes?

No, diatomaceous earth will not keep bees from pollinating garden plants such as tomatoes.

Diatomaceous earth is a natural insecticide that works by dehydrating and killing insects with a hard exoskeleton, such as ants and cockroaches. Bees, however, have a soft exoskeleton and are not affected by diatomaceous earth. In fact, bees are often attracted to diatomaceous earth because it can help them to clean their bodies.