越冬前松果梢斑螟幼虫的空间分布型及抽样技术  

The spatial distribution pattern and sampling technique of Dioryctria pryeri larvae before overwintering

作　　者：张立蓉 杨丽[1] 李继泉[1,2] 崔建州 ZHANG Lirong;YANG Li;LI Jiquan;CUI Jianzhou(College of Forestry,Hebei Agriculture University,Baoding 071000,China;Key Laboratory of Forest Germplasm Resources and Forest Protection of Hebei Province,Baoding 071000,China)

机构地区：[1]河北农业大学林学院,河北保定071000 [2]河北省林木种质资源与森林保护重点实验室,河北保定071000

出　　处：《林业与生态科学》2025年第1期26-32,共7页Forestry and Ecological Sciences

基　　金：河北省林业和草原科技计划项目(2101005)。

摘　　要：松果梢斑螟是危害多种松类球果的重要钻蛀性害虫,研究越冬前松果梢斑螟幼虫的空间型和抽样技术,可为该虫的危害程度调查、预测预报和有效防治提供供理论依据。应用7个聚集度指标以及Iwao m*-m回归法和Taylor幂指数法,研究了油松林中越冬前松果梢斑螟幼虫种群的空间分布型,并分析了其聚集原因。结果表明,越冬前松果梢斑螟幼虫主要分布于被上一代幼虫危害过的球果中,但在油松东南西北4个方位上的数量无显著差异。聚集度指标分析表明松果梢斑螟幼虫的分布型为聚集型;Iwao回归分析结果显示幼虫为聚集分布,分布的基本成分为个体群,幼虫个体之间相互吸引;Taylor幂指数法证实松果梢斑螟幼虫种群为聚集分布,且聚集强度随种群密度的增大而提高。聚集均数λ>2,说明聚集分布是由松果梢斑螟自身行为习性(亲代雌虫产卵习性和幼虫取食习性)和球果化学特性共同作用所致。基于Iwao m*-m回归模型明确了在不同相对误差下不同虫口密度时的最适理论抽样数,并依据防治指标确定了序贯抽样数。综上,越冬前松果梢斑螟幼虫主要分布于被害球果中,其种群空间分布型为聚集分布;最适理论抽样数和序贯抽样数,可为松果梢斑螟幼虫的监测和防治提供指导。Dioryctria pryeri is an important cone borer of many species of trees in genus Pinus.The objective of this study is to explore the spatial pattern and sampling techniques of D.pryeri larvae before overwintering,andthus to provide theoretical basis for infestation survey,forecasting,and effective management of this borer pest.The spatial distribution patterns of the population of D.pryeri larvae on Pinus tabuliformis before overwintering were studied by seven aggregation indexes,Iwao's regression model,and Taylor's power law,and the reasons for their aggregation were also analyzed.The results showed that before overwintering,D.pryeri larvae were mainly distributed in the cones that had been infested with the previous generation of larvae.However,there was no significant difference in larvae number in the four directions of east,south,west,and north of P.tabulaeformis planted in east,south,west,and north areas.The analysis of aggregation indexes showed that the distribution pattern of D.pryeri larvae belonged to aggregation distribution;.Iwao’s regression analysis demonstrated that the larvae was aggregation distribution,and the basic component of distribution was individual insect,which attracted each other on pine trees;.Taylor's power law proved that the spatial distribution pattern of D.pryeri larvae belonged to aggregation distribution,and the aggregation intensity increased with the population density.It was proposed that the aggregation distribution is caused by the combined action of D.pryeri behavior habits(oviposition habits of parent females and larvae feeding habits)and chemical properties of cones asλvalue was more than 2.Based on Iwao's regression model,the optimal theoretical sampling number for different population densities under different relative errors was determined,and the sequential sampling number was determined based on the control index.In summary,before overwintering,D.pryeri larvae are mainly distributed in the infested cones,and their population spatial distribution pattern is aggreg

关 键 词：油松 松果梢斑螟 空间分布型 抽样技术 

分 类 号：S763.3[农业科学—森林保护学]