Sub-Lethal Effects of Fenvalerate on the Development, Fecundity, and Juvenile Hormone Esterase Activity of Diamondback Moth, Plutella xylostella (L.)  

作　　者：WEI Hui WANG Juan LI Hong-shan DAI Hua-guo GU Xiao-jun 

机构地区：[1]institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou 350013, P.R.China [2]College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, P.R. China [3]Yancheng Institute of Technology, Yancheng 224003, P.R.China [4]Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, P.R.China

出　　处：《Agricultural Sciences in China》2010年第11期1612-1622,共11页中国农业科学（英文版）

基　　金：support for this work was provided by the National Natural Science Foundation of China(30971922);the Natural Science Foundation of Fujian Province, China (B0320003, B0410015, 2004J010, and2007F5021);the Science and Technology Innovation Foundation of Fujian Academy of Agricultural Science,China (STIF-Y07);the Program for New Century Excellent Talents in University of Fujian Province, China,to Associate Professor Gu Xiaojun

摘　　要：The toxicities of fenvalerate （20% EC） to the 3rd instar larvae of diamondback moth （DBM）, Plutella xylostella （L.）, reared on three host plants viz., radish, oilseed rape, and cabbage were tested. The LC50 values of fenvalerate to the 3rd instar larvae of DBM varied with host plants, however, there wasn＇t any significant difference among them （P〉 0.05）. Similarly, DBM fed on three host plants had same pupal weight, pupal period, pupation rate, adult emergence rate, female ratio, and fecundity. The activity of juvenile hormone esterase （JHE, EC 3.1.1.1） in the 3rd instar larvae of DMB did not significantly vary with host plants, either. These suggested that DBM had similar fitness on the three host plant species. When fed on the host plants pretreated with fenvalerate at the concentrations equivalent to LC20, LC50 and LC50, the pupation rate, pupal weight, adult emergence rate, female ratio, fecundity, and JHE activity of the tested insects were declined as compared with insects in control treatments fed on the same host plant species. Furthermore, the pupal period of the tested insects was extended after fenvalerate treatment. The decrease in JHE activity after fenvalerate treatment in the tested insects could partly explain the changes in the mentioned growth parameters. Whether the role of fenvalerate in the inhibition of JHE activity could serve as a new way to control DBM needs further investigation.The toxicities of fenvalerate （20% EC） to the 3rd instar larvae of diamondback moth （DBM）, Plutella xylostella （L.）, reared on three host plants viz., radish, oilseed rape, and cabbage were tested. The LC50 values of fenvalerate to the 3rd instar larvae of DBM varied with host plants, however, there wasn＇t any significant difference among them （P〉 0.05）. Similarly, DBM fed on three host plants had same pupal weight, pupal period, pupation rate, adult emergence rate, female ratio, and fecundity. The activity of juvenile hormone esterase （JHE, EC 3.1.1.1） in the 3rd instar larvae of DMB did not significantly vary with host plants, either. These suggested that DBM had similar fitness on the three host plant species. When fed on the host plants pretreated with fenvalerate at the concentrations equivalent to LC20, LC50 and LC50, the pupation rate, pupal weight, adult emergence rate, female ratio, fecundity, and JHE activity of the tested insects were declined as compared with insects in control treatments fed on the same host plant species. Furthermore, the pupal period of the tested insects was extended after fenvalerate treatment. The decrease in JHE activity after fenvalerate treatment in the tested insects could partly explain the changes in the mentioned growth parameters. Whether the role of fenvalerate in the inhibition of JHE activity could serve as a new way to control DBM needs further investigation.

关 键 词：crucifer plants FENVALERATE sublethal effect juvenile hormone esterase （JHE） diamondback moth （DBM） Plutella xylostella （L.） 

分 类 号：S482.84[农业科学—农药学] TQ453.292[农业科学—植物保护]