综防田和化防田稻田蜘蛛群落优势类群相异性比较研究

Comparative Study on Issimilarity of the Dominant Spider Families of Rice Field Spider Community in IPM and Chemical Control Field

在早、晚稻的发育各期 ,湖南稻田蜘蛛的主要优势类群均为狼蛛科、皿蛛科、球蛛科和肖蛸科。化学农药对四大优势科蜘蛛的个体数量影响较大 ,两类防治田优势科蜘蛛的个体数量大多在 30 %～ 6 2 %之间 ,差异最大的是在早稻发育晚期 (7月份 )皿蛛科蜘蛛的相异性达 6 7.5 9%。并且发现化学农药对占座型蜘蛛的影响远大于游猎型蜘蛛。

This article deals with the main dominant families of rice field spider,during the different development stages of both early rice field and late rice field in Hunan which were Lycosidae, Linyphiidae, Theridiidae and Tetragnathidae.The individual number of the dominant spider families were affected by chemical pesticide,difference of individual number of the dominant spider families was among 30%～62% for the most part in different control types of rice field, the most difference was among the late stage of development of early rice,and the difference of individual number of Linyphiidae was 67.59%. It was also found that the effect of chemical pesticide to net spiders was stronger than wandering spider.