Answer: The larvae that attack the apple tree are mainly hawthorn leafhoppers, apple all-claws, and two-leafhoppers. Prevention and control methods for agricultural pests on leafy hoppers of apple trees include: Sowing the grass trunk or covering the grass with tree trays before wintering. This way, a large number of wintering females can be trapped. Burned; scrape rough skin from trunks, eradicate weeds in gardens and gardens, eradicate host in early spring; timely irrigate, increase relative humidity in field, cause ecological environment that is not conducive to the occurrence of leafhoppers; control the amount of nitrogen fertilizer, increase application of phosphate fertilizer and potash fertilizer Enhance tree power. In addition, it can be controlled by chemicals. Before the apple tree germinates, it sprays a 3–5 degree lime sulfur agent; it takes care of the post-anthesis and postharvest flower control. The pre-spawning period and the 1st-generation egg hatching after 1 week after flowering were completed. The overwintering hatching period of apple was about 1 week before flowering. The first generation egg hatched at 1 week after flowering and the late growth period was at the end of June. To August is the fastest period of leafhopper breeding, and there is a serious overlap between generations. At this time, the fruit grower is best to choose to have a good killing effect on all fleas, such as konjac, broom, avermectin, triazot, etc. Pharmacy.
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