一、前言苹果红蜘蛛PanonyChus、ulmi、KOCh是我省苹果产区的主要敌害之一。自1954年以来,由于果园内长期使用有机磷制剂的剧毒农药防治害虫,从而引起此虫的大量繁殖为害,常常造成叶片苍黄、果实着色不佳、秋季开二次花,严重削弱树势。据调查结果1970年前,每年全省苹果树约有半数以上受害成灾。造成此虫的猖獗蔓延成灭的主要原因: I. Introduction Apple red spider PanonyChus, ulmi, KOCh is one of the main enemy of the apple-producing areas in our province. Since 1954, due to the long-term use of pesticides in orchards organophosphorus pesticide pest control, causing the insect multiply damage, often resulting in yellowish leaves, fruit coloring is poor, open a second flower in autumn, seriously weakening the tree vigor. According to the survey results, before 1970, about half of the apple trees in the province were harmed each year. The rampant rampant spread of the worm into the main reasons for the killing: