摘要
本文对瓜类昆虫群落中主要害虫与主要天敌间的相互关系进行了典范相关分析，结果表明，瓜类害虫与天敌间第一对典范相关系数ｒ＝０９９２１，第二对典范相关系数ｒ＝０９７５０，均达极显著水平，说明瓜类害虫与天敌间存在较为稳定的数量反馈机制．典型变量分析结果表明，在害虫亚系统中贡献最大的是瓜亮蓟马（ＴｈｒｉｐｓｆｌａｖｕｓＳｃｈｒａｎｋ）和朱砂叶螨（ＴｅｔｒａｎｙｃｈｕｓｃｉｎｎａｂａｒｉｎｕｓＢｏｉｓｄｕｖａｌ）．天敌亚系统中贡献最大的是菜少脉蚜茧蜂（ＤｉａｅｒｅｔｉｅｌｅｒａｐａｅＣｕｒｔｉｓ）和八斑球腹蛛（ＴｈｅｒｄｉｏｎｏｃｔｏｍａｃｕｔａｕｍＢｏｅｓｅｔＳｔｒ）．
In this paper we analysed the interrelation of main pests and natural enemies in gourd vegetables by using method of canonical correlation analysis. The results showed that the first (r=0992 1) and second (r=0975 0) cononical correlation coefficients were significant. This means that there exists a stable feed-back mechanism between pests and their natural enemies. The results of canonical variable analysis indicated that the contribution of thrips flavus Schrank, Tetrangchus cinnabarinus Boisbural in pest subsystem is the greatest and so is the contribution of Diaerelielle rapae Curtis, Therdion octomaculaum Boes et Str in natural enemies subsystem.
关键词
瓜类
昆虫群落
害虫与天敌
典范相关分析
gourd insect community pest and natural enemies cononical correletion analysis
