The growth, development and reproduction of any animal and plant are controlled by hormones. Using this unique physiological characteristic of organisms, the development of hormone-type pesticides is one of the directions for the development of pesticides in the future. Currently, it has been widely used in production: interference. Chitin synthesis inhibitors and accelerators for insect molting, such as chlortetracycline (Tsuzilon), kasik, Ulead, and Miman, are common features of these pesticides: low toxicity, high efficiency, and their toxicity (large Oral acute oral LD50 is generally about 5000 mg/kg, and the application concentration is about 2000-3000 times. Because the insecticidal mechanism is to inhibit or accelerate the synthesis of chitin, the insect moltings are delayed or accelerated, and insect deaths are caused. After 2-3 days of emergence of the drug, the application should be carried out 1-2 days before the appropriate period of control. These pesticides focus on the prevention and control of Lepidoptera larvae, such as Noctuidae, Acrididae, Leafhoppers and other pests. The other pesticides are insect behavior regulators, which do not directly kill pests, but change and interfere with the behavior of pests, so as to reduce the population density of pests and reduce the loss of crops. The use of cotton red bollworm sexual inducement in production Agents (sex pheromones), these pesticides are characterized by a strong specificity. Low toxicity to humans and animals (rat oral acute LD50 is 5000 mg/kg). It is the purpose of interfering with the red bell worm to achieve pest control. China Agricultural Network Editor
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