本文根据1984、1985年在重庆北碚辣椒田多点系统调查资料,采用频次分布检验和聚集度指数判别等方法对侧杂食跗线螨对辣椒田间为害空间分布型进行初步探讨。结果认为田间受害株率在0.375—0.42以下时,侧杂食跗线螨为害株的田间分布为聚集型;在0.375—0.42以上时则为均匀分布型。在同一受害水平下,样方大小在4—9株的范围内,不至影响分布型的变化,而改变样方的性质对基本聚集度指数有较大的影响。 Based on the investigation of multi-point system in Beidiao (Capsicum annuum L.) field in 1984 and 1985 in Beidou, Chongqing, the spatial distribution pattern of spider mite on mites in the field was preliminary studied by frequency distribution test and clustering index. The results showed that the field distribution of Tetranychus cinnabarinus was aggregated in the field with the strain rate below 0.375-0.42, while it was uniform in the range of 0.375-0.42. Under the same damage level, the quadrat size ranged from 4 to 9 strains, which did not affect the distribution change. However, changing the nature of quadrats affected the basic clustering index significantly.