红富士苹果园害虫与天敌群落的定量分析

Quantitative analysis of insect pest and natural enemy communities in Red Fuji apple orchard

应用多元分析方法对烟台市牟平区红富士苹果园害虫与天敌群落进行了定量分析,采用最优分割法将苹果害虫与天敌群落的时序结构分为5个阶段,并分析了各个时序段害虫及天敌的发生特点.对害虫亚群落、捕食性天敌亚群落和寄生性天敌亚群落进行了主成分和因子分析,明确了不同时期起主要作用的害虫及其天敌种类.典型相关分析表明,主要害虫及其天敌类群之间存在显著相关性,其中金纹细蛾与其寄生蜂、绣线菊蚜与其寄生蜂、山楂叶螨与其专一性捕食性天敌深点颏瓢虫和东方钝绥螨之间的相关性高.

The insect pest and natural enemy communities in Red Fuji apple orchard in Mouping District of Yantai City were quantitatively analyzed by multivariate analysis. The temporal structure of the communities was grouped into five continuous stages by using optimal sorting method, and the community characteristics at each stage were described. The dominant pests and natural enemies were determined at different growth stages of apple trees through analyzing the sub-communities of the insect pests and the predatory and parasitic enemies by principal component analysis and factor analysis. Canonical correlation analysis showed that there were significant correlations between the dominant insect pests and the dominant natural enemies, especially between Lithocolletis ringoniella and its parasitoids, between Aphis citricola and its parasitoids, and between Tetranychus viennensis and its obligatory predatory enemies, Stethorus punctillum and Amblyseius orientalis.