恒温下灰茶尺蛾种群两性生命表的研究  

Study on age-stage two-sex life table of Ectropis grisescens at constant temperature

作　　者：袁争[1] 张家侠[1] 曹士先 YUAN Zheng;ZHANG Jiaxia;CAO Shixian(Tea Research Institute,Anhui Academy of Agriculture,Huangshan 245000;Research Centre of Engineering Technology,Wuyi Rock Tea Company in Fujian Province,Wuyishan 354300;Wuyi Star Tea Industry Limited Company,Wuyishan 354300)

机构地区：[1]安徽省农业科学院茶叶研究所,黄山245000 [2]福建省武夷岩茶企业工程技术研究中心,武夷山354300 [3]武夷星茶业有限公司,武夷山354300

出　　处：《安徽农业大学学报》2020年第1期7-11,共5页Journal of Anhui Agricultural University

基　　金：国家重点研发计划“茶园化肥农药减施增效技术集成研究与示范”(2016YFD0200900)资助。

摘　　要：灰茶尺蛾是安徽及周边省份重点防控的茶树害虫之一。以年龄-阶段特定两性生命表为研究手段,以得出其种群特征,从而为控制其种群增长规模提供参考。结果如下:(1)灰茶尺蛾内禀增长率r=0.1883,周限增长率λ=1.2072,净增殖率R0=248.65粒,平均世代周期T=29.24 d。(2)特定年龄-阶段存活率在卵期至3龄幼虫期等4个阶段中较高,其峰值依次为1、0.8391、0.8244与0.8388。(3)3条生殖力曲线(fxj、mx、lxmx)均于初产卵历约28 d时达到最大值,分别为167.76粒、85.63粒和65.67粒;生殖价值Vxj曲线在初产卵历约27 d时达到峰值,为307.25粒;生命期望最大值e0,1=27.60d。由以上结果可得出:恒温下(26±1)℃,灰茶尺蛾种群属于r对策者,且种群处于扩增状态;自初产卵历约31 d始,灰茶尺蛾种群特定年龄存活率(lx)急剧下降,直至成虫全部死亡;雌成虫期是灰茶尺蛾种群增长的重要贡献因子,其对后代的主要贡献集中于初产卵历经约27~28 d之时。Ectropis grisescens is one kind of widespread pest species on Camellia sinensis in Anhui and its neighboring provinces. Therefore, its population characteristics were acquired by the age-stage two-sex life table, so as to manage the growth of its future population. The results were as follows:(1) For Ectropis grisescens, the intrinsic rate of increase(r), finite rate of increase(λ), net reproductive rate(R0) and mean generation time(T) were 0.188 3, 1.207 2, 248.65 and 29.24 d, respectively.(2) Peak values of the age-stage survival rate(Sxj), higher from the eggs to the 3 rd larvae, were 1, 0.839 1, 0.824 4 and 0.838 8, respectively.(3) Three kinds of fecundity curves(fxj, mx and lxmx) all peaked on the 28 th day, and their peak values were 167.76, 85.63 and 65.67 eggs, respectively;the reproductive value(Vxj) peaked on the 27 th day, and the peak value was 307.25 eggs;the maximum value of life expectancy(e0,1) was 27.60 d. The conclusions could be inferred from the results above: at the constant temperature(26±1)℃, Ectropis grisescens was of r-selected species and the number of the population still kept growing;the age-specific survival rate(lx) of the species had been sharply decreasing since the 31 st day, until all of the individuals were dead;it was the female adults who contributed more than the other stages to the population growth of Ectropis grisescens, and the peak values of their contributions were roughly on the 27 th or the 28 th day.

关 键 词：茶树 灰茶尺蛾 两性生命表 r对策 

分 类 号：S435.711[农业科学—农业昆虫与害虫防治]