... , flies, termites, fire ants, and lice. It is used as an insecticide on grain, cotton, field, fruit, nut and vegetable crops, and ... and ornamental plants. It is also registered for direct use on sheep and turkeys, for horse site treatment, dog kennels, ... dwellings, farm buildings, storage bins, and commercial establishments. Chlorpyrifos acts on pests primarily as a contact poison, with some action as ...