The three neonicotinoids thiamethoxam, clothianidin, and imidacloprid are applied as seed coatings on some 150 million acres of crops yearly, including corn and soybeans. Neonicotinoids are a group of neurotoxic insecticides used widely on farms and in urban landscapes. Plants absorb them and can be present in pollen and nectar, and have been blamed for killing bees or changing their behaviors.