转Bt基因抗虫棉棉盲蝽防治指标研究  

Research on the economic threshold of cotton plant bugs to transgenic Bt cotton

作　　者：徐文华[1] 李红阳[1] 王瑞明 左文惠[1] 刘标[3] 

机构地区：[1]江苏沿海地区农业科学研究所,江苏盐城224002 [2]盐城市植保植检站,江苏盐城224002 [3]国家环保总局南京环境科学研究所,江苏南京210042

出　　处：《华东昆虫学报》2007年第4期254-260,共7页Entomological Journal of East China

基　　金：江苏省自然科学基金项目(BK2006501);环保科研专项"转基因大宗农作物环境风险评价技术研究";公益性科研院所基本科研业务费专项资金"转基因抗虫棉对黄萎病抗性下降机理的研究";江苏省"十五"农业攻关资助项目(B6-101);盐城市科技发展计划项目(YK2001149;YK2007042-7)

摘　　要：2005-2006年,采用田间接虫试验的方法,分别研究了江苏沿海棉区棉盲蝽优势种绿盲蝽和中黑盲蝽对Bt棉的为害与产量损失。结果表明,Bt棉田的被害株率和产量损失均随着接虫量的加大而增加,其对数相关均达极显著水平,直线相关也达显著至极显著水平;Bt棉田棉盲蝽的防治可以若虫数量与被害株率两项指标来把握,2种盲蝽混合种群第2、3、4代虫量推广防治指标分别为百株有2、3龄若虫5头、10头和20头上下;或被害株率依次为3%、8%和15%左右。The yield loss of transgenic Bt cotton caused by Lygus lucorum and Adelphocoris suturalis in the coastal area of Jiangsu Province was studied through inoculation experiment from 2005 to 2006. The results showed that both the injured rate and the yield loss increased as the number of inoculated pests increased, whose nonlinear logarithm correlation and linear correlation were significant. The nymphal quantity and injured rate could be used as the controlling indices of cotton plant bugs. The extending economic threshold is about 5, 10, and 20 nymphae per 100 plants, or the injured rate is about 3%, 8% and 15% in the 2nd, 3rd and 4th generation of the two mixed populations respectively.

关 键 词：棉盲蝽 转BT基因抗虫棉 为害损失 防治指标 

分 类 号：S435.622[农业科学—农业昆虫与害虫防治]