烟蚜种群动态与天敌效果评价

Population Dynamics of Myzus persicae (Sulzer) and Evaluation of Its Natural Enemies Effects

根据１９９５年和１９９７年烟田系统调查资料，得出烟蚜Ｍｙｚｕｓｐｅｒｓｉｃａｅ（Ｓｕｌｚｅｒ）的种群数量动态呈双峰曲线，第一高峰消长阶段烟蚜茧蜂ＡｐｈｉｄｉｕｓｇｉｆｕｅｎｓｉｓＡｓｈｍｅａｄ和食蚜绒螨Ａｌｏｔｈｒｏｍｂｉｕｍｓｐ．以及第二高峰消长阶段龟纹瓢虫Ｐｒｏｐｙｌａｅａｊａｐｏｎｉｃａ（Ｔｈｕｎｂｅｒｇ）、中华草蛉ＣｈｒｙｓｏｐａｓｉｎｉｃａＴｊｅｄｅｒ和大灰食蚜蝇ＭｅｔａｓｙｐｒｈｕｓｃｏｒｏｌａｅＦａｂｒｉｃｉｕｓ数量波动趋势与烟蚜同步。相关分析、Ｆｕｚｚｙ聚类分析和通径分析表明：影响烟田烟蚜种群数量变化的天敌分为：草间小黑蛛Ｅｒｉｇｏｎｉｄｉｕｍｇｒａｍｉｎｉｃｏｌｕｍ、烟蚜茧蜂和食蚜绒螨以及中华草蛉、龟纹瓢虫、大灰食蚜蝇和小花蝽ＱｒｉｕｓｍｉｎｕｔｕｓＬ．三个功能类群，其中烟蚜茧蜂与中华草蛉和龟纹瓢虫分别是控制烟蚜第一、第二高峰消长阶段种群数量增长的优势种群。

The results of systematic field investigations in 1995 and 1997 showed that the population of M.persicae (Sulzer) gave a two-peak type dynamic curve.The population dynamics of Aphidius gifuensis Ashmead and Allothrombium sp.was accorded with that of M.persicae (Sulzer) at the first peak and so were Chrysopa sinica Tjeder,Propylaea japonica (Thunburg) and Metasyprhus corollae Fabricius' at the second peak.The results of correlation,fuzzy aggregation and path analysis indicated that the natural enemies affecting the population dynamics of M.persiae (Sulzer) in tobacco field might be classified into three types of fuctional group.e g.<Erigonidium graminicolum (Sundevall)>,<A.gifuensis Ashmead and Allothrombium sp.>and<C.sinica Tjede,P.japonica (Thungerg),S.corollae Fabricius and Orius similis Zheng>.A.gifuensis Ashmead was the dominant population of natural enemies to control M.persicae (Sulzer) at the first peak of M.persicae's population,while C.sinica Tjeder and P.japonica (Thungerg) at the second peak.