Pesticide Toxicology: Go through insect mouthparts. Pharmacy with food into the digestive tract through insect mouthparts are in the intestinal absorption of Jiangsu five percent an acre of land granules, through the circulatory system to reach the site of action of insects poisoning caused by the mode of action of Shanghai 5% granules acre of land, known as stomach poisoning . There are stomach-action drug called stomach poison, such as organic phosphorus trichlorfon 5 percent an acre of land granules, pyrethroid pesticides. Pesticides Virulence: a liquid immersion method. The test insects were placed in different concentrations of diluted liquid immersed in it, remove immediately, on absorbent paper to absorb excess liquid, into containers in each group, give fresh leaves as feed Luoyang 5% an acre of land granules, stamped on the container gauze or gauze, keeping in the room, recording room, observe the poisoning death at different times.