中华微刺盲蝽在黄瓜植株上的空间格局

中华微刺盲蝽是一种重要的捕食性天敌,在华南地区分布极为普遍。本文通过计算Iwao聚片回归、Taylor幂法则等聚集强度指数,结果表明中华微刺盲蝽在黄瓜植株上的分布属于聚集分布,基本成分是个体群。分布的聚集强度与密度有关,随种群密度的升高而增大。聚集原因分析表明:当种群密度不太大(m<1头.叶-1)时,聚集原因由环境因素引起,即由它的食物节瓜蓟马的聚集特性引起:当种群密度较大(m≥1头.叶-1)时,聚集原因由节瓜蓟马的聚集特性和它本身的聚集特性引起。

STUDY ON SPATIAL DISTRIBUTION PATTERN OF CAMPYLOMMA CHINENS1S SCHUH ON CUCUMBER

Campylomma chinensis Schuh is a predatory mirid bug and is very common in Southern China. The results obtained by measurement of the indices of aggregation intensity, such as analysis of Iwao's patchiness regression between m and m, Taylor's power law and so on, indicated that the spatial distribution pattern of C. chinensis on cucumber was aggregation distribution and its basic component was individual group. Its aggregation degree increased with the increase of population density. The aggregation on the one hand was caused by environmental conditions (its prey Thrips palmi)when the population was not dense( m < 1) , and on the other hand was caused by environmental conditions(its prey Thrips palmi)and the aggregation characteristics of population themselves when the population is dense( m > 1) .The results could be used as a theoretical basis for prevention and controlling of melon thrips Thrips palmi ( Kamy) .