亚致死剂量甲氨基阿维菌素苯甲酸盐对棉铃虫生长发育的影响  

Effect of sublethal dose of emamectin benzoate on growth and development of Helicoverpa armigera(Hübner)

作　　者：董利霞[1] 芮昌辉[1] 任龙[1] 谭晓伟[1] 

机构地区：[1]中国农业科学院植物保护研究所,农业部作物有害生物综合治理重点实验室,北京100193

出　　处：《植物保护学报》2011年第6期539-544,共6页Journal of Plant Protection

基　　金：国家“十一五”科技支撑计划(2006BAD08A03);公益性行业(农业)科研专项(200903033)

摘　　要：以甲维盐亚致死剂量LC25连续筛选棉铃虫10代获得一个亚致死种群(Sub10),用Sub10和同源对照种群(CP)研究甲维盐对棉铃虫的亚致死效应。亚致死剂量(LC25)处理CP和Sub10 3龄初幼虫,CP幼虫的生长抑制率为61.24%,显著大于Sub10的36.23%。亚致死剂量处理种群与空白对照相比,以及Sub10与CP相比,前者均表现为生长发育延缓,蛹期延长,但蛹重、产卵量和卵孵化率无显著差异。亚致死剂量处理后,CP的净生殖率(R0)、内禀增长率(rm)、周限增长率(λ)分别由385.60、0.21、1.23降低至91.86、0.15、1.16,平均世代时间(T)和种群倍增时间(Dt)分别由28.24天和3.29天延长至29.93天和4.64天;而Sub10仅rm显著降低、T显著延长。说明甲维盐亚致死剂量对棉铃虫生长、繁殖有不利影响。A population（Sub10） of cotton bollworm（CBW）,Helicoverpa armigera（Hübner）,which obtained by treating successively the 3rd instar larvae of a CBW colony for 10 generations using sublethal dose（LC25 dose） of emamectin benzoate,and the homologous control population（CP） were used to evaluate sublethal effects of the insecticide on the pest insect.The results indicated that the sublethal dose significantly inhibited growth of third instar larvae of CP with 61.24% of inhibition rate,but only 36.23% of inhibition rate of Sub10.The sublethal dose delayed the CBW growth and development,prolonged the pupa period,but had no effect on pupa weight,fecundity and egg hatching rate in both populations compared with their untreated populations.There were same sublethal effects in Sub10 compared with CP when reared without insecticide treatment.When treated with the sublethal dose in CP,values of net reproductive rate（R0）,intrinsic rate of increase（rm） and finite rate of increase（λ） significantly decreased from 385.60,0.21,and 1.21 to 91.86,0.15,and 1.16,respectively,and mean generation time（T） and population doubling time（Dt） significantly increased from 28.24 days,and 3.29 days to 29.93 days,and 4.64 days,respectively,but in Sub10,only rm and T showed significant change.The results suggest that sublethal dose of emamectin benzoate brings negative effects on growth and develop-ment of H.armigera.

关 键 词：甲维盐 棉铃虫 亚致死剂量 生物学特性 生命表参数 

分 类 号：S435.622.3[农业科学—农业昆虫与害虫防治]