Here in California we have the almond industry. Commercial farmers tell the beekeepers when they are going to spray, so the beek can hold off bringing hundreds of hives for pollination, and then again to let the beeks take the hives back home before any more spraying.
Last year, about an hour up the road, Oregon had two tragic sprayings from pest control employees that didn't read the directions on the label of neonicanoids, saying wait until the trees are not in bloom. Big parking lots were just full of dead bees, hundreds of thousands. So tragic!