Get out of the citrus rust tick prevention and control, so as to improve the efficacy of pesticides .
Apply blindly. If you use "insurance drugs", you should take medicine once every other time, which not only causes the cost of medication to increase, but also pollutes the environment. Moreover, due to the excessive number of medications, the drug resistance is enhanced and the drug treatment effect is reduced. What is more serious is that Missed the appropriate period of control: when applying the drug may not be a prophylactic period, and it may be a prophylactic period when the drug is not applied, so the insurance drug is not insured. Prevention and control of rust tick should capture the low-grade medications that are harmful. To do this, we must do a good job of pest observation: choose 3~5 orchards, observe 3~5 plants in each place, observe 10~20 fruits randomly, and use 10~20 times to enlarge the microscope, and check 4 fields per fruit. If the average number of insects per field of view is more than 2, or 20% of the fruit surface is harmful, it is necessary to apply the drug in time. Rust tick occurs 18 to 20 generations a year, and it is necessary to suppress the previous generations as much as possible.
Long-term single use of acaricides. Some orange farmers have long used old pesticides such as dicofol, acesulfame, and omethoate. These old pesticides not only seriously pollute the environment and the quality of agricultural products, but also kill a large number of natural enemies. Moreover, due to the drug resistance caused by long-term use, the pesticide control effect is significantly reduced. Some new pesticides start to use good control effects, but long-term single use and directional selection So that some individuals with strong resistance are preserved and propagated from generation to generation, the number is from small to large, and eventually becomes the dominant population, and the lethality of the pesticide is lost. The pesticide network recommends that you use 2 to 3 new pesticides and use them alternately. For example, you can use 34% 螨 æ€ ä¹³ 2000 2000 2000 2000 2000, 20 20 1500 1500 1.8 1.8 〠〠〠〠1.8 1.8 1.8 1.8 1.8 1.8 1.8 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 4000 2~3 kinds of alternating use of 2000~3000 times of emulsifiable concentrate, 80% of sensitized zinc 800 times solution, 20% of Yingsaifeng emulsifiable oil 1500 times solution and 5% of cut emulsifiable concentrate 800 times solution, apply at 4 o'clock in the afternoon After doing it as well, it is beneficial to improve the control effect. At the same time, pay attention to spray the liquid on the front and back of the leaves and fruits to ensure the effect.
Use a large number of pesticides that kill natural enemies. Such as the use of green milk copper, can kill, copper ammonia, DT fungicide, double effect spirit and other copper preparations, streptomycin, Ye Qingshuang, bacteria poison clear and other bacteria-killing pesticides, a large number of natural enemies of rust tick - - Thompson's bacterium, which plays an important role in controlling rust wall mites. After the application of the above pesticides, the number of T. sinensis was sharply reduced, and the rust tick was out of control. In addition, the use of ester pesticides such as quick killing, killing, Nisolang, and enemy killing (killing pyrethroid) kills natural enemies such as grasshoppers, ladybugs, and predators, causing rust wall enlargement. occur. Therefore, it is preferable to use the above-mentioned pesticides in a high-temperature drying period. For example, 10% sputum can be used to control citrus, 25% cockroach can be used to control scales, 50% fungicide carbendazim can be used to control anthrax, and 25% acephate can be used to control pteridoides. .
Not timely drought-resistant irrigation. As a result, the drought in the orange orchard is not only reduced, but also the plant's ability to resist mites, and because the orange orchard is too dry, it is not conducive to the reproduction and activity of T. sinensis.
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