sentences:  Other bees at the hives exhibited tremors, uncoordinated movement and convulsions, all signs of insecticide poisoning.The insecticides were also consistently found at low levels in soil up to two years after treated seed was planted and on nearby dandelion flowers and in corn pollen gathered by the bees.Insecticide-treated seeds are covered with a sticky substance to control its release into the environment, however they are then coated with talc to facilitate machine planting.