new york state beekeeper jim doan saw it firsthand. >> i've worked in bees for now 46 years, and so i know what normal looks like, and what we've seen over the last 6 or 7 years is not normal. >> hoybee loshas consuences f the ecomy. one-thd of fooproducedn th u.s. depends ononeybee pollinaon. >> we e puttinat risk sevel hundred billion dollars of product every year. it is gnificant becae the crops thaare pollined are some of them that really add diversity and vitality to our diet. honeybe lossesave been linked tmultipleactors, lie pestices, habit degration, mnutritio athogensand varr mite infestions. for peicide manufacturer bayer crop science, the issue is clear. >> most experts agree that the single greatest threat to honeybee health is the varroa mitean invase blood-cking pesthat botdirectly parasitizes young and adult bees and vectors bee diseases. where varroa mites are absent or well controlled, honeybees are thriving >> but jim says he knows why his bees are dying. >> we had a multitude of neonics that were showing up in our bees. it doesn't take much to kill a bee. >> neonico