三明市马尾松毛虫越冬代幼虫的空间格局

Spatial distribution pattern of overwintering Dendrolimus punctatus larva

结合三明市马尾松毛虫工程治理中所调查的越冬代马尾松毛虫幼虫种群数量和危害程度,采用概率分布模型、分布型指数及回归模型法探讨三明市马尾松毛虫越冬代幼虫空间分布格局。结果表明,三明市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。同时,列出林间调查最适抽样数及序贯抽样分析表,提出马尾松毛虫防治的上下限指标,为害虫的综合治理提供了一定的理论依据。

Based on the Dendrolimus punctatus Walker. engineering control in Sanming City, the data of population quantity of overwintering D. punctatus larva and its harm were obtained. The population spatial pattern of overwintering D. punctatus larva were analyzed by the probability distribution model, 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. Meanwhile, 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.