90年代以来,苹果叶螨在我省历年呈扩展趋势,为了提出有效对策与防治措施,我们于1991～1994年对其生物学特性与防治方法进行了研究,现将研究结果报道如下。1　方法与结果1.1　自然消长规律观察1.1.1　越冬卵孵化与物候期调查方法:在本所苹果园选越冬卵集中的枝痕4～5处,上?.. Since the 1990s, apple spider mite has been expanding in the past years in our province. In order to put forward effective countermeasures and prevention measures, we conducted a study on its biological characteristics and prevention methods from 1991 to 1994, and the results are reported as follows. 1 Methods and Results 1.1 Observation of natural growth and decline of 1.1.1 Overwintering egg hatching and phenology survey method: In our apple orchard selected wintering eggs dendrite marks 4 to 5, on?