In a meeting dexamethasone 4 mg ivp In a recent study, pollen contaminated with insecticides and fungicides poisoned honey bees and weakened the beesâ? resistance to a deadly parasite. Whatâ?s more, the poisoned pollen didnâ?t just come from agricultural crops. In fact, many bees collected most of their pollen from wildflowers, as opposed to the fields that farmers pay beekeepers to pollinate.