小菜蛾响应^(60)Co-γ辐照的实验室种群生命表  

Life tables of laboratory populations of diamondback moth Plutella xylostella in response to ^(60)Co-γirradiation

作　　者：杨雨航 陈雅余 王梦然 李丹宁 王欣蕾 翁群芳 Yang Yuhang;Chen Yayu;Wang Mengran;Li Danning;Wang Xinlei;Weng Qunfang(College of Plant Protection,South China Agricultural University,Guangzhou 510642,Guangdong Province,China)

机构地区：[1]华南农业大学植物保护学院,广州510642

出　　处：《植物保护学报》2023年第2期493-500,共8页Journal of Plant Protection

基　　金：国家重点研发计划(2016YFD0200506)。

摘　　要：为明确^(60)Co-γ亚不育剂量辐照对小菜蛾Plutella xylostella种群数量动态变化的影响,构建小菜蛾种群动态变化模型,在实验室条件下通过建立小菜蛾生命表获得种群特征参数、个体生理指标,预测亚不育剂量辐照对小菜蛾种群的影响。结果显示,亚不育剂量辐照组的羽化率显著高于完全不育剂量组,与空白对照组无显著差异,各处理羽化率无性别差异,亚不育剂量辐照组F_(1)代孵化率显著低于空白对照组。亚不育剂量辐照组种群各阶段发育历期、存活率及繁殖力生命指标低于空白对照组。小菜蛾亚不育剂量辐照组世代平均历期(19.90 d)、世代净生殖率(2.35)、周限增长率(1.04 d^(-1))、内禀增长率(0.04 d^(-1))均低于空白对照组,而种群加倍时间(16.16 d)高于空白对照组。空白对照组世代平均历期、每日单雌产卵量与产卵时间均长于亚不育剂量辐照组。辐照组与对照组种群生命表参数对比,表明亚不育剂量降低了小菜蛾种群世代数和幼虫期的个体存活率,使F_(1)代雌虫个体数减少。In order to investigate the effect of ^(60)Co-γsub-sterile irradiation on the population dynamics of diamondback moth Plutella xylostella,a model of the population dynamics of P.xylostella was constructed.The life table was formed and analyzed under laboratory conditions.The population characteristic parameters and individual physiological indicators were obtained by establishing the life table of moths treated with the sub-sterile dose,and the population trend was predicted.The fecundity of moths was significantly higher at the sub-sterile dose than at the sterile dose,but not different from the negative control.There was no sex difference between the doses,while the hatching rate of F_(1) in the sub-sterile treatment group was significantly lower than in the control.The developmental duration,survival rate and fecundity of the treatment group were reduced.The mean generation time(19.90 d),the net reproduction rate(2.35),the finite rate of increase(1.04 d^(-1))and the intrinsic rate of increase(0.04 d^(-1))of the treatment group were lower than those of the control,but with higher population doubling time(16.16 d).The overall lifespan,daily egg production and egg-laying duration of the control were higher than those of the treatment group.Based on life table parameters in different treatments,the results indicated that the sub-sterile dose reduced the number of generations and the survival rate of larval stage,and the number of F_(1) females was decreased.

关 键 词：小菜蛾 实验种群 辐照 生命表 

分 类 号：S433.4[农业科学—农业昆虫与害虫防治]