Due to differences in insect body wall construction, making the insect body is hardening inconsistent. Therefore, the rate of penetration of insecticides on insect cuticle different except tiger injection, poisoning rate insects are also different. Pharmacy and insect parts easily penetrate easily poisoned: Room at the film festival film, antennae, feet and other Zhoukou except tiger injection, the agent easily through. Feeling insect parts, pharmaceutical easily penetrated. Pesticide Toxicology: Go through insect mouthparts. Pharmacy by insect mouthparts with food is absorbed into the digestive tract in addition to intestinal Xinxiang tiger injection, through the circulatory system to reach the site of action of insects poisoning caused by the mode of action in addition to Tiger injection Zhejiang, known as stomach poison. There are stomach-action drug called stomach poison, such as trichlorfon organophosphate, pyrethroid pesticides.