Well, my neighbor called my about 10 min before they started spraying their field with 2-4-D. it is about a 5 acre piece of land. the fenceline is about 40yds from my apiary to the west. It seemed like whatever breeze there was tonight was out of the south.(not much) I told her that this was not the ideal time to spray a herbicide whereas we are in the middle of a nectar flow. The bees were mostly out of the fields and back in the hives when they we spraying. Should I be concerned????????? we are in the apex of our heavy nectar flow and they have/had blooming foliage on the land. I currently have 8 supers about half full right now.