DDVP is a kind of medium toxic pesticide, it has the actions of fumigaton and cntact poisoning, it exhibits good dffects in controlling chewing and sucding pests. DDVP's vapour pressure is higher, resulting in a mighty smashing force on pests. It is liable to decompose after being applied, and it's residual poisonous duration is shorter. This product is suitable for controlling varieties of pests on cotton, fruit trees, economic forest, vegetables, xugar cane, tobacco, tea plant and timber forest; It also exhibits a good effect in controlling mosquitoes, flies, warehouse pests, rice weevils, ostomatids etc.