asking for help,or ideas. i keep bees on 2 farms across the road from each other, last fall had 10 hives on one side and 4 hives on the other. we raise fruit and veg.and out of the 4 hives 3 made it overwinter, on the other side all 10 are dead. question is the 4 hive side we keep the fruits[ strawberry, rasp, blueberry, melons etc. the 10 hive side was our sweet corn and some was bt. i remember picking that corn and there were bees in the tassles gathering pollen. is it possible the pollen would still contain bt and bees storing pollen in the hive for baby bee food contains enough bt to kill the young, therefore no hives that were in front of the insect traited corn survived? any thoughts on this would help greatly, or is there any way i can check the pollen stores in the dead hives for contamination before i install bees in there again to go thru the same problem?