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Application of Biological Pesticides to Control Liriomyza sativae
Liriomyza sativae is difficult to prevent and control completely due to its high dietary complexity and harm. Since it was introduced to China in 1994, the worm has now spread to many provinces and cities across the country, causing great harm to vegetable production. Liriomyza sativae harms most of protected vegetables such as legumes, cucumbers, loofahs, tomatoes, eggplants, and open-air vegetables. It is used to prevent and cure Liriomyza sativae Blanco. Among them, the appropriate control of drug use is an important measure for comprehensive prevention and control. In the use of drugs, the use of chemical pesticides in the past prevention and treatment, the effect is not ideal. Application of biological pesticides to control L. sativae is effective. The first choice of biopesticides was 0.25% A. elegans 1500 times and 25% diflubenzuron No. 3 suspension agent 1000 times. The effect of the two insecticides was 95%. The effective ingredient of avermectin is avermectin, and its common name in China is "qi qi." It is an antibiotic produced by the fermentation of microorganisms; it is a nerve signal blocker in most agricultural pests. Diflubenzuron III is an inhibitor of insect chitin synthase and is an insect growth regulator. The insecticidal mechanism is to inhibit the synthesis of chitin in insects, so that Kunsheng cannot die and die. There are three main characteristics of the application of A. versicolor and diflubenzuron III biological pesticides in the control of Liriomyza sativae. 1, control effect is good, long residual period. 0.2% A. venetum milk 1500 times or 25% diflubenzuron III 1000 times to prevent and control the Liriomyza sativae, the effect can reach 95% or more, residual effect for 20 days. 2. Safe to natural enemies and safe to the environment. Awei insect clear and diflubenzuron third harm to natural enemies is the ideal agent for comprehensive prevention and treatment. The two drugs have no pollution, low toxicity and low residue to the environment and meet the requirements of producing “harmless†vegetables. 3. For crop safety, in the case of increasing the dose multiple times, the application of these two drugs, most vegetables without injury. Application of A. verruta and diflubenzuron III to prevent and control the duration of the control of L. sativae in the first half of the larvae on the leaves, spraying once every 7 days, and spraying 2 to 4 times, can be applied separately. The agents can also be used interchangeably. Spray carefully and carefully. It is advisable to add 1000 times the pesticide synergist, Lipid, to the medicinal liquid to increase the permeability, spreadability and adhesiveness of the medicinal preparation so as to make the medicinal effect higher and more lasting.