林业与生态科学2025，Vol.40Issue(1)：26-32,7.DOI:10.13320/j.cnki.hjfor.2025.0004
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
摘要
Abstract
Dioryctria pryeri is an important cone borer of many species of trees in genus Pi nus.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 be-fore overwintering,D.pryeri larvae were mainly distributed in the cones that had been in-fested 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 popu-lation 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 as λ value was more than 2.Based on Iwao's regres-sion 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 aggrega-tion distribution.The optimal theoretical sampling number and sequential sampling number can be used for the monitoring and control of D.pryeri larvae.关键词
油松/松果梢斑螟/空间分布型/抽样技术Key words
Pinus tabuliformis/Dioryctria pryeri/spatial distribution pattern/sampling tech-nique分类
农业科技引用本文复制引用
张立蓉,杨丽,李继泉,崔建州..越冬前松果梢斑螟幼虫的空间分布型及抽样技术[J].林业与生态科学,2025,40(1):26-32,7.基金项目
河北省林业和草原科技计划项目(2101005). （2101005）
