About 7 years ago it was reported that bee colonies were dying off. It was being caused by some virus or infection in the hives, I think. The following year I noticed no honey bees at our place and was very disturbed by that. Fortunately other insects are pollinators also. People might not think much about bees and the roll they play world wide but a world without bees would be a disaster. We garden almost exclusively organically and don't use any pesticides.
I can understand bees being affected by the use of pesticides but don't understand why planting GMO corn 2 weeks earlier would affect bees.