山植叶螨是苹果园主要害虫之一。以雌成螨在苹果树枝干裂缝隙中和树干基部土缝中越冬。成虫３月上旬开始出蛰，３月底、４月初出蛰量猛增，进入高峰。４月中旬为产卵高峰，５月初为若螨出现高峰，７月上中旬为成虫全年为害高峰。９月以后绝大多数进人越冬状态，在果园很难找到 Mountain spider mites are one of the major pests in apple orchard. Female adult mites in the cracks in the cracks in the branches of apple and tree trunk base soil cracks in winter. Adults began to sting out early in March and the end of March and early April saw a sharp increase in sting and peak. The mid-April is the spawning peak and the peak of the nymphs in early May. The peak of adult-born pests in mid-July is the peak in July. After September most of the people into the winter, difficult to find in the orchard