摘要： 据1989年4～9月在北京延庆辛庄堡苹果园调查资料，以Iwao回归法、Taylor幂法则及4个聚集指标对山楂叶螨活动螨在苹果树内的空间格局（静态水平）、空间动态（时-空-量水平）进行了测定。初步结果表明，该活动螨呈聚集分布，分布的基本成分为个体群。全年发生期可分为前期、中期、后期三个时期（4月、5～6月、7～9月）.前期（叶簇）为越冬螨出蛰期，以东方、上层及内膛的螨口密度大；中期（叶片）为螨口增长期，后期为螨口衰退期。中、后期螨口分布逐渐变化为：各方位螨口密度差别不大；中、下层密度大于上层；中、外围密度大于内膛。

关键词: 山楂叶螨, 活动螨, 空间格局, 动态

Abstract: Based on the analysis of the data obtained from apple orchards in Beijing area between April and September,1989,the Iwao regression method,the Taylor power principle and 4 aggregated indices were used to test the spatial patterns and dynamics of hawthorn spider mites (Tetranychus viennensis Zacher) at the movable stages (larva,nymph and adult).The results showed that the mites distributed in an aggregative pattern and the basic component of distribution was individual colonies.The annual occurrence of this mite could be divided into three periods (April,May-June and July-Sept.).In April, mites emerged after overwintering and distributed at the highest in the east quadrant,the upper stratum and the inner part of the canopy.The number of mites increased between May and June,and decreased between July and September.In the 2nd and 3rd peneds,little difference was found in distribution density in the 4 quadrants and the density was higher in the lower and middle strata and in the periphery part of the canopy.

Key words: Hawthorn spider mites, Movable mites, Spatial patterns, Dynamics.patterns

中图分类号: 

• S433.7