危害梨树的各种害虫的卵、蛹或幼虫、成虫以及各种病菌孢子，冬天都会隐居于树干粗皮裂缝、落叶、残枝病梢或果园土壤中潜伏越冬。抓住这一有利时机消灭病虫害，可收到事半功倍的效果。入冬时，清理果园地面上的大量落叶和残果以及杂草，并运出果园焚烧，可有效杀死隐藏其中的 Harm the pests of pear pests eggs, pupae or larvae, adults and a variety of bacteria spores, winter will be buried in the trunk bark cracks, leaves, branches or branches of the soil lurking in the winter. Seize this favorable opportunity to eliminate pests and diseases, can receive a multiplier effect. Winter, clean up the ground orchard leaves and a lot of residual fruits and weeds, and shipped out of the orchard burning, which can effectively hide the hidden