Introduction: Chlorpyrifos is a broad-spectrum organophosphate insecticide. While originally used primarily to kill mosquitoes, it is no longer registered for this use. Chlorpyrifos is effective in controlling cutworms, corn rootworms, cockroaches, grubs, flea beetles, flies, termites, fire ants, and lice. It is used as an insecticide on grain, cotton, field, fruit, nut and vegetable crops, and well as on lawns and ornamental plants. It is also registered for direct use on sheep and turkeys, for horse site treatment, dog kennels, domestic dwellings, farm buildings, storage bins, and commercial establishments. Chlorpyrifos acts on pests primarily as a contact poison, with some action as a stomach poison. It is available as granules, wettable powder, dustable powder and emulsifiable concentrate.
USE: For aphids, ants, armyworm, billbugs, chinch bugs, corn borers, corn earworm, corn rootworm, cotton leafworm, cutworms, flea beetles, grasshoppers, grubs, lesser cornstalk borer, locusts, mole crickets, seedcorn maggot (slurry seed treatment), sowbugs in field crops, forage, industrial, nursery crops, ornamentals, vegetables, and dormant application to fruit trees.
CHEMICAL GROUP: Organophosphate
MODE OF ACTION: Acetylcholine esterase inhibitor
TOXICITY: (Rat): Oral LD50 96-270 mg/kg. (Rabbit): Dermal LD50 2000 mg/kg. (Guinea pig): Oral LD50 504 mg/kg.