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红蜘蛛是危害果树的重要害虫之一,在天津郊县果园中发生的种类主要有山楂红蜘蛛(Tetranychus viennensis Zacher)和苹果红蜘蛛(Panonychus ulmi Koch),同属于蜘蛛纲蜱螨目叶螨科。山楂红蜘蛛是主要危害种群,以为害苹果、桃、梨、李、杏、山楂等为主;苹果红蜘蛛主要危害苹果。受害果树叶片呈现失绿斑点,严重时叶子枯焦,树势衰弱,严重影响当年及来年的产量。一般年份减产15～20％严重年份损失达30～50％以上。过去曾使用有机磷农药防治果园红蜘蛛,因长期使用导致红蜘蛛产生抗药性,以
Red spider is one of the most important pests that endanger the fruit trees. The main species occurring in orchards in the suburbs of Tianjin are Tetranychus viennensis Zacher and Panonychus ulmi Koch, all belong to the family Aterasmidae. Hawthorn red spider is the main endangered species, in order to harm apples, peaches, pears, plums, apricots, hawthorn and other main; apple red spider is the main hazard to apples. Victims of fruit trees leaves showing green spots, serious leaves Jiaojiao, Shusu weak, seriously affecting the current year and the coming year’s output. General year cut 15 ~ 20% serious years of loss of more than 30 ~ 50%. In the past, organophosphate pesticides were used to control orchard spider mites, resulting in the long-term use of spider mites resistant to