冬天,梨树刮皮不仅可有效地消灭在梨树皮缝越冬的大量病菌和害虫,而且还可以促进老树更新生长。但应注意以下四点: 一、刮皮的对象:通常是十年以上树龄的梨树,因其主要枝、干、皮层都会发生不同程度的裂缝,会隐藏害虫的卵、蛹或幼虫。 In winter, pear skin scraping can not only effectively eliminate a large number of pests and pear pests bark wintering, but also can promote the regeneration of old trees. But should pay attention to the following four points: First, the object of skin scraping: usually more than ten years old pear tree, because of its main branches, stems and cortex will occur in varying degrees of cracks will hide pests eggs, pupae or larvae.