中文摘要：

本文应用反频次比较法在福建邵武市11块毛竹Phyllostachys heterocycla cv.pubescens林样地上调查浙江双栉蝠蛾Bipectilus zhejiangensis幼虫的空间分布格局及该虫的发生与生态环境的关系。调查结果表明：以每株毛竹笋为单位,通过正频次比较法分析,浙江双栉蝠蛾幼虫在总计抽样的550株竹笋上的分布符合负二项分布。以样地为单位,经过反频次比较法分析11块样地上浙江双栉蝠蛾的分布类型,结果为：样地1,2,4,5和8属于奈曼分布,样地7,9,10和11属于负二项分布,样地3和6属于奈曼分布或负二项分布。判别分析法判别函数能够100%正确分组,依据F值大小,6个环境指标的重要性从大到小依次为：土壤有机质（X5）、林地卫生（X6）、坡位（X3）、坡向（X4）、竹林结构（X2）、立竹度（X1）。由此得出：无论是以每株毛竹笋为单位,还是以每个样地为研究对象或单位,都表明浙江双栉蝠蛾幼虫在空间分布上属于非均匀的聚集型分布。土壤腐殖质厚、林地卫生差可使双栉蝠蛾幼虫密度增大,立竹度、竹林结构、坡位和坡向单个指标对浙江双栉蝠蛾幼虫密度的影响不明显,但综合作用明显;反频次比较法比聚集度指标评价更为详细科学。

英文摘要：

This paper dealt with the spatial distribution pattern of Bipectilus zhejiangensis larvae and the relationship between the occurrence and environmental factors in 11 field plots of bamboo（Phyllostachys heterocycla cv.pubescens） forest sampled in Shaowu,Fujian province by positive/counter comparison frequency and discriminant analysis methods.Positive comparative frequency analysis showed that the spatial distribution pattern of B.zhejiangensis larvae fitted the negative binomial distribution in total 550 bamboo shoots sampled in the plots.Taking each plot as a unit and analyzed by counter-comparison frequency method,it was found that plots 1,2,4,5 and 8 fitted the Neyman distribution,plots 7,9,10 and 11 fitted the negative binomial distribution,and plots 3 and 6 fitted the Neyman or the negative binomial distribution.The method of discriminant analysis could be 100% exact to discriminant function.The importance of the six environmental indexes from high to low were in the sequence of soil humus（X5） ,forest health（X6） ,slope position（X3） ,slope orientation（X4） ,bamboo structure（X2） and stand density（X1） according to the F values.It was concluded that the spatial distribution pattern of B.zhejiangensis larvae belongs to the aggregation type with non-uniform distribution whether sampled by bamboo shoot or by plot.The density of B.zhejiangensis larvae in plot with thick soil humus and bad forest sanitation were larger than in other place.The effects of the single index such as the stand density,bamboo structure,slope position and orientations on the density are not significant but their integrated effects are significant.More information can be obtained by the counter-comparison frequency method than by the aggregation index for analyzing spatial distribution pattern of insects.