What are the pesticides commonly used in pollution-free vegetables?

What are the pesticides commonly used in pollution-free vegetables?

(1) live microbial strain

Such as Bacillus thuringiensis (Bt), Beauveria bassiana and insect virus infection. Bt is an insecticide against bacteria, which means that the intestines and stomach of pests will be numb within a few minutes after eating, so that pests will starve to death and die of leukemia. At present, it has been found that it has different degrees of poisoning effects on Coleoptera larvae such as Pieris rapae, Plutella xylostella, Plutella xylostella and Spodoptera exigua, which is very worthy of popularization and application in vegetables and fruits. Beauveria bassiana parasitizes in insects according to its contact with insect body surface, absorbing water and nutrients of insects, which leads to the obstruction of physiological metabolism and death of insects. It can not only infect larvae, pupae and nymphs, but also have special effects on the next generation and have good control effects on Pieris rapae and Pieris rapae.

(2) Metabolites of microbial strains

Gentamicin, micromomycin and phytomycin can reasonably control various bacterial diseases and insect pests of vegetables and fruits, such as soft rot, bacterial angular leaf spot, angular leaf spot and so on. , and has become a common drug to control such diseases and insect pests; Avermectin can affect the physiological activities of the nervous system of pests, cause numbness and die after stopping eating for 2 ~ 3 days; Cai Xi uses Bacillus compounds for purification, which has very low toxic and side effects, fast pest control and good control effect on Pieris rapae and Plutella xylostella. This kind of fertilizer also includes Jinggangshan mycin, Wuyi mycin, liuyangmycin, Huaguangmycin and Nongkang 120.

(3) Green plant extract

These fertilizers include azadirachtin, ginkgo biloba, rotenone, nicotine, matrine, anisodamine and so on. Azadirachtin is a kind of green botanical insecticide extracted from neem seeds, which has the characteristics of poor appetite, avoidance, stomach toxicity, contact killing and affecting the growth and development of many insects of all ages. It mainly shows good control effect on Plutella xylostella, Pieris rapae, Spodoptera exigua and other insects. Matrine is an insecticidal active substance extracted from Radix Scrophulariae. Once the pest comes into contact with this drug, the central nervous system will be numb, which will make the insect protein coagulate, block the stomata of the insect body and suffocate the pest. It has good control effect on aphids, Pieris rapae and mites. This kind of fertilizer also includes veratrine, pyrethrin, Celastrus angulatus, toosendanin and so on.

(4) Insect growth hormone for children

Common ones are diflubenzuron, diflubenzuron, Carker, Yiping Life Insurance, buprofezin, acaroid and tebufenozide. This chemical fertilizer can kill pests according to all the normal growth and development of insects, such as inhibiting chitin production, inhibiting insect peeling and promoting insect peeling early.

(5) Insect sex attractant

During the growing period, females or males will release sexual information to induce friends of the opposite sex to mate with nymphs. The application of artificial attractants can affect insect mating, reduce the chance of insect mating, and then reduce the amount of female eggs laid. In the case of using insect sex attractants, traps, such as water tanks and power grids, can be used to eliminate the attracted pests and predict the occurrence period of pests.