ScienceDaily In a first-ever study investigating the risk of neonicotinoid insecticides to ground-nesting bees, University of Guelph researchers have discovered hoary squash bees are being exposed to lethal levels of the chemicals in the soil . Story here. Hoary bees forage on a squash flower. Ilona Loser RELATED: New Studies Show Farm Chemicals Are Affecting More Than Bees. Bird Populations are Declining, too. Is modern agriculture's hold on nature becoming a death grip?