Recently, researchers from Penn State University have started looking at the pesticide residue in the loads of pollen that bees carry home as food, and they've found that every batch of pollen that a honeybee collects has at least six detectable pesticides in it, and this includes every class of insecticides, herbicides, fungicides, and even inert and unlabeled ingredients that are part of the pesticide formulation that can be more toxic than the active ingredient.
U posljednje vrijeme, istraživači sa sveučilišta Penn State počeli su promatrati zaostatak pesticida u hrpama peludi koje pčele donose kući kao hranu, i otkrili su da svaka mjerica peludi koju pčela medarica skupi sadrži bar šest prepoznatljivih pesticida, što uključuje svaku vrstu insekticida, herbicida, fungicida, pa čak i inertnih neimenovanih sastojaka, koji su dio formulacije pesticida, koji mogu biti otrovniji od aktivnog sastojka.