Stomach poisoning stomach poison should have the conditions: drug with food absorbed into the digestive tract may be dissolved. This in itself in digestive solubility and molecular weight agents, the nature of dissociation and so on. Insect digestive pH is an important determinant of the agent can be absorbed. Food containing pesticide against insects loudly avoid 5% hexaflumuron EC, no antifeedant: Insects probation is very sensitive to chemicals in Zhejiang 5% hexaflumuron EC, but according to the probation of chemical species differ: general feeling of poor insects inorganic, organic synthesis of amidine insecticides, Lepidoptera larvae antifeedant. Insects of organic synthesis reactions vary greatly pesticides, organic synthetic drugs for some very weak influence.