A: The prevention and control of apple leaves requires both agricultural control measures and chemical control measures. Agricultural control measures include bunching grass rings or tree-covered grass on the trunk before wintering, which can trap a large number of wintering females, which are burnt out before the spring in the next year; scrape the trunk and scrape the skin, and remove the weeds in the garden and the garden. Eliminate the early spring host; timely irrigation, increase the relative humidity in the field, resulting in an ecological environment that is not conducive to the occurrence of leaf mites; control the application of nitrogen fertilizer, increase the application of phosphate fertilizer and potassium fertilizer, and enhance the tree potential. In terms of chemical control, the fruit grower can spray 3 to 5 Baume's stone sulfur mixture before the fruit tree germinates. From late June to August, it is the fastest period of leafhopper reproduction. The generation overlap is serious. At this time, it is best to choose Kruth, broom, avermectin and triazole which have good killing effect on each state. Tin and other medicines.
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