57% Malathion - 1 galMalathion 57% is an emulsifiable concentrate used to control fleas in yards and lawns, aphids, grasshoppers, spiders, beetles, earwigs, mosquitoes and may also be applied on vegetables, fruits, nuts, ornamentals, trees, and pastures. Target Pests Malathion 57% is used for the control of adult flies fly maggots aphids cereal leaf beetle leafhoppers grasshoppers spider mites cabbageworm clover leaf weevil lygus bugs carrot weevil spittlebugs stink bugs