Based on the data of mean population density of overwintering larvae of Dendrolimus punctatus in Shatang forest farm in Guangxi Province, the spatial pattern of overwintering larva of D. punctatus were analyzed by the distribution index and regression model method. The results showed that the spatial pattern of overwintering larvae of D. punctatus assumed the aggregation pattern, the basic component of distribution was individual group. The optimal sampling number of forest survey and the sequential sampling analysis were presented, and the upper and low bound index for controlling D. punctatus were put forward to provide certain theoretical basis for integrated pest management.
为研究苹掌舟蛾Phaleraflavescens（Bremer et Grey）越冬蛹在西南桦Betula alnoides林中的空间分布格局，于2012年4月在广西百色市老山林场利周分场受苹掌舟蛾危害的西南桦人工林，随机抽取样树挖取距树基水平0～250cm、距地表垂直深度15．1cm以内的土壤调查苹掌舟蛾越冬蛹分布情况；采用6种聚集度指标和4种回归模型分析越冬蛹空间分布格局。结果表明：苹掌舟蛾越冬蛹在西南桦林中主要分布在距树主干基半径0～150cm、深度0—10cm的土层；离样树基部水平距离越近及离地表越近的土壤区间分布越冬蛹越多，反之则越少。以聚集分布为主，分布基本成分为个体群；昆虫本身聚集行为或与环境异质性共同作用、环境因素作用等均可能是其聚集原因。这为今后苹掌舟蛾在西南桦林中的预测预报及防治提供了一定的科学依据。
