成都地区黄秋葵蚜虫天敌种类及其类群动态研究

摘要

2014－2015年，调查研究了成都地区黄秋葵蚜虫发生特点、其天敌资源种类和优势天敌类群发生动态，发现成都地区为害黄秋葵的蚜虫主要是棉蚜，其天敌资源有5目8科21种，优势种有棉平突蚜茧蜂、异色瓢虫、龟纹瓢虫和大草蛉。棉蚜发生量在黄秋葵移栽40 d 即达到高峰期，后逐渐下降，棉平突蚜茧蜂发生动态与棉蚜的发生动态具有较强的跟随关系，瓢虫、草蛉和食蚜蝇的发生动态差异较大，与棉蚜的发生动态跟随关系不明显。%The aphid and their natural enemies on okra in Chengdu were investigated during 2014 and 2015,and the occurrence dynamics of dominant enemies was studied systematically.The results indicated that the aphid on okra is mainly Aphis gossypii Glover.There were 21 species of natural enemies,which belonged to 8 families of 5 orders,and the dominant ones were Lysiphlebia japonica (Ashmead),Harmonia axyridis (Pallas),Propylea ja-ponica (Thunberg)and Chrysopa pallens (Rambur).The numbers of aphid peaked 40 days after transplanted,and then decreased gradually.The occurrence dynamics of L .japonica had a strong following relationship with that of aphid.There was obvious difference among the dynamic of ladybugs,lacewings and hoverflies,and their following relationship of occurrence dynamic was not obvious with that of aphid.