马尾松毛虫越冬代幼虫空间分布格局研究

Study on Spatial Distribution Pattern of Overwintering Dendrlimus punctatus Larva

根据2008年广西沙塘林场马尾松毛虫越冬代幼虫虫口密度,采用分布型指数及回归模型法探讨了广西沙塘林场马尾松毛虫越冬代幼虫空间分布格局。结果表明,马尾松毛虫越冬代幼虫呈聚集分布,分布的基本成分为个体群。列出了林间调查最适抽样数及序贯抽样分析表,提出了马尾松毛虫越冬幼虫防治的上下限指标,为害虫综合治理提供了一定的理论依据。

Based on the data of mean population density of overwintering Dendrolimus punctatus larva in Guangxi Shatang Forest-farm,the population spatial pattern of overwintering D. punctatus larva were analyzed by the indices of distribution and regressive models. The results showed that the spatial pattern of overwintering D. punctatus larva exhibited an aggregation pattern,with individual colony as its component. The optimal sampling number of forest survey and the sequential sampling analysis were presented,while the upper and low indices of D. punctatus control were put forward to provide feasible control management in D. punctatus.