The insecticides you are thinking of are applied before flowering and after the nectar has dried up. The hives are trucked in and then out. Otherwise, the honey bees would be killed. BTW, honey bees are not native to North America. They are packed into hives and moved around from farm to farm. Most places in the states, the hives are not allowed to over-winter. They live very stressful lives here. Back during the 2005 bee die-off, it was found a batch of diseased queens had been shipped in from Australia.

But we do have bumble bees. A real study would check the native populations for effects.