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4种药剂处理对中稻田害虫-捕食性天敌群落的影响
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摘要:
研究了三唑磷、杀虫双、阿维菌素、Bt 吡虫啉4种药剂处理对安徽江淮地区中稻田害虫-天敌群落的影响.结果表明,4种药剂处理对主要害虫的种群增长均有显著控制作用.三唑磷对群落多样性影响最大,其次是杀虫双,阿维菌素和Bt 吡虫啉处理区影响最小,其各处理区群落多样性平均值分别为1.509、1.537、1.770和1.782,均显著低于空白对照区(群落多样性平均值为1.945);药剂处理2周后,杀虫双处理区与三唑磷处理区的群落组成最相似,与Bt 吡虫啉处理区最不相似. 从群落稳定性和害虫可持续控制的角度看,4种药剂处理中以阿维菌素最优.
关键词:  稻田  害虫-捕食性天敌群落  杀虫剂
DOI:
投稿时间:2005-11-15
基金项目:安徽省科技攻关项目 , 安徽省合肥科技局资助项目
Effects of insecticides on insect pest-predatory natural enemy communities in middle-season paddy fields
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Abstract:
Effects of four insecticides including triazophos,shachongshuang,abamectin and Bt+imidacloprid on the insect pest-natural enemy communities in middle-season paddy fields in the Yangtze-Huaihe regions of Anhui Province were studied.The results showed that all the four insecticide treatments had significant effects on dominant insect pest population growth.Triazophos had greater effects on community diversity than the others,and abamectin and Bt+imidacloprid had the least effects on community diversity.The average values of community diversity in triazophos,shachongshuang,abamectin and Bt+imidacloprid treatment plots were 1.509,1.537,1.770 and 1.782,respectively,all of which were significantly lower than that in blank control plot(the average value of community diversity was 1.945).After two weeks of the insecticide treatment,the community composition in shachongshuang treatment plot was similar to that in triazophos treatment plot,and which was significantly different from that in Bt + imidacloprid treatment plot.As a result,the authors suggested that abamection is better than the others to control insect pests in middle-season paddy fields.
Key words:  paddy field  insect pest-predatory natural enemy community  insecticide

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