抓好果园的腐烂病、白粉病、红蜘蛛、卷叶虫、瘤蚜和金龟子等主要病虫的防治工作,足使果树健壮、多结果、结好果的重要保障。针对这些病虫害的主要发生特点、时期,可采取如下防治措施:1.苹果树腐烂病.它是一种毁灭性的枝干病害。病菌孢子从早春2月开始在空气中飞散传播,经伤口侵入皮部,在死组织里潜伏、繁殖,集聚侵染势。一旦树体营养不佳、衰弱,病菌即分泌毒素,杀死周围活组织,而导致发病。一般在6、7月落皮层形成开始产生表面溃疡,尔后向深处发展,至翌春 Do a good job orchard rot disease, powdery mildew, spider mite, leaf roller worms, aphids and scarabs and other major pests and diseases prevention and control work, enough to make fruit trees robust, more results, the results of an important guarantee. In view of the main peculiarities of these diseases and pests, the following control measures can be taken: 1. Apple tree rot disease. It is a devastating branch disease. Spore from the early spring in February spasmodic spread in the air, the wound invaded the skin, the latent tissue in the dead, breeding, gathering potential infection. Once the tree poor nutrition, weakness, bacteria that secrete toxins, killing the surrounding living tissue, which led to the disease. Usually in June and July the formation of cortex began to produce surface ulcers, then developed to the depths, to the next spring