Also more anecdotal evidence, but I was talking to a local beekeeper. For fields that they sprayed, the lost over 60% of their bees per year. They got sick and tired of it and decided to place their bees long term in fields that do not spray. Now, their bees are less stressed, don't get sprayed, and the bee deaths plummeted, and they do less work trying to build the ranks after than they were dying.

Win-win for them really.