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不同寄主植物上马铃薯甲虫种群生长发育的比较研究
引用本文:罗进仓,刘长仲,周昭旭.不同寄主植物上马铃薯甲虫种群生长发育的比较研究[J].昆虫学报,2012,55(1):84-90.
作者姓名:罗进仓  刘长仲  周昭旭
作者单位:甘肃农业大学草业学院, 兰州 730070
基金项目:公益性行业(农业)科研专项
摘    要:马铃薯甲虫Leptinotarsa decemlineata (Say)是马铃薯Solanum tuberosum等茄科作物上的一种毁灭性害虫。为了探明寄主植物对新疆马铃薯甲虫种群生长发育的影响, 本研究通过非选择性试验测定了马铃薯、 茄子Solanum melongena和番茄Lycopersicon esculentum 3种栽培寄主及野生寄主中亚天仙子Hyoscyamus pusillus对马铃薯甲虫种群生长发育、 存活、 繁殖及生命表参数的影响。结果表明: 马铃薯甲虫幼虫虽然能够取食番茄, 但幼虫的发育历期长、 存活率低且蛹不能羽化, 表明番茄不是新疆马铃薯甲虫种群的适宜寄主。马铃薯、 茄子、 中亚天仙子3种寄主植物对该虫卵、 幼虫、 蛹的存活率和发育历期及成虫产卵前期没有显著影响, 但对蛹重和繁殖力影响显著。取食不同寄主植物后, 该虫蛹重和繁殖力从大到小的次序为: 马铃薯>茄子>中亚天仙子; 种群的净增殖率(R0)、 内禀增长率(rm)和种群趋势指数(I)从大到小依次为: 马铃薯>茄子>中亚天仙子。因此马铃薯为新疆马铃薯甲虫种群的最适宜寄主, 其次为茄子和中亚天仙子, 而番茄为不适宜寄主。

关 键 词:马铃薯甲虫    寄主植物    存活率    繁殖力    生命表  

A comparative study of development and reproduction of the Colorado potato beetle, Leptinotarsa decemlineata (Say) ( Coleoptera: Chrysomelidae),on different host plants
LUO Jin-Cang , LIU Chang-Zhong , ZHOU Zhao-Xu.A comparative study of development and reproduction of the Colorado potato beetle, Leptinotarsa decemlineata (Say) ( Coleoptera: Chrysomelidae),on different host plants[J].Acta Entomologica Sinica,2012,55(1):84-90.
Authors:LUO Jin-Cang  LIU Chang-Zhong  ZHOU Zhao-Xu
Institution:College of Grassland Science, Gansu Agricultural University, Lanzhou 730070, China
Abstract:The Colorado potato beetle,Leptinotarsa decemlineata(Say)(Coleoptera:Chrysomelidae),is one of the most destructive pests infesting potatoes and other nightshade plants.In order to ascertain the influence of different host plants on development and reproduction of the Colorado potato beetle in Xinjiang,we conducted no-choice assays to determine the effects of four plants on the growth,development,and life table parameters of the Xinjiang population of the Colorado potato beetle.The results showed that the larva of L.decemlineata might feed on tomato(Lycopersicon esculentum),but it had the longest developmental duration and the lowest survival rate.Moreover,on tomato its pupae could not emerge to adults.The other three host plants,i.e.,potato(Solanum tuberosum),eggplant(Solanum melongena) and Henbane(Hyoscyamus pusillus),showed no significant effect on the survival and developmental duration of the egg,larva,pupa,and preoviposition.However,the pupal weight and adult fecundity were significantly affected by host plants,and the order of the effect from high to low were as follows:potato>eggplant>henbane.The net reproductive rate(R0),the intrinsic rates of increase(rm) and index of population trend(I) of the Xinjiang population were the highest on potato,and less on eggplant and the lowest on henbane.The results suggest that the most preferred plants for the Xinjiang population of L.decemlineata is potato,and eggplant and henbane can serve as its suitable hosts but tomato can not.
Keywords:Leptinotarsa decemlineata  host plant  survival rate  fecundity  life table
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