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近些年来,在豫西三门峡地区的广大果园,陆续发生了山楂叶螨、苹果全爪螨和二斑叶螨混生为害的状况。由于三种害螨越冬状态的不同,初始世代同一时期的虫态类型表现不一致,加上生物学特性的差异,给有效防控带来了很大困难。因此,我们对害螨的混生状态和发展,给予了特别关注,并适时制定了相关综合防治措施。1发生状况1.1害螨混生衍生状况据资料显示,1981年在灵宝市寺河山区海拔1 000m左右的果园内,发现有山楂叶
In recent years, in the majority of orchards in the Sanmenxia area in western Henan, hawthorn spider mites and apple-spotted mites and two-spotted spider mites have been successively mixed and harmed. Due to the different overwintering states of the three pest mites, the inconsistent appearance of the pest states in the same period of the initial generation, together with the differences in biological characteristics, have brought great difficulties in effective prevention and control. Therefore, we paid special attention to the mixed state and development of pest mites, and formulated relevant comprehensive prevention and treatment measures in due course. 1 Occurrence 1.1 Pest mites derived from the mixed situation According to statistics, in 1981 in Lingbao Sihe mountain area about 1 000m above sea level in the orchard, found hawthorn leaves