Study Shows Neonicotinoid Pesticides Hinder Honey Bees’ Grooming

A study published by the University of Guelph in Canada shows that exposure to neonicotinoid pesticides reduces honey bees’ ability to groom and rid themselves of deadly varroa mites. The researchers experimented with three sublethal doses of clothianidin, all similar to what the bees would experience while feeding on flower nectar of neonic-treated crop fields. The bees were also introduced to varroa mites. The study found a complex and non-additive interaction between the two stressors, even at the lowest level.