草地贪夜蛾取食桑树的生命周期研究  

Study on the Life Cycle of Spodoptera frugiperda Feeding on Mulberry Leaves

作　　者：田铃 李愉[2] 谢晓乐 黄志君 李晓东[1] 刘吉平[1,2] TIAN Ling;LI Yu;XIE Xiaole;HUANG Zhijun;LI Xiaodong;LIU Jiping(College of Chemical and Biological Engineering,Hechi University/Guangxi Key Laboratory of Sericulture Ecology and Applied Intelligent Technology/Guangxi Collaborative Innovation Center of Modern Sericulture and Silk,Hechi 546300,China;College of Animal Science,South China Agricultural University,Guangzhou 510642,China)

机构地区：[1]广西现代蚕桑丝绸协同创新中心/广西蚕桑生态学与智能化技术应用重点实验室,河池学院,广西河池546300 [2]华南农业大学动物科学学院,广东广州510642

出　　处：《广东农业科学》2024年第8期10-20,共11页Guangdong Agricultural Sciences

基　　金：国家自然科学基金(31970463);广西蚕桑生态学与智能化技术应用重点实验室开放课题(2024GXKLSEAIT02);广西现代蚕桑丝绸协同创新中心开放课题(2023GXCSSC13);岭南现代农业科学与技术广东省实验室科研项目(NZ2021021)。

摘　　要：【目的】探究取食桑叶对草地贪夜蛾(Spodoptera frugiperda)生长发育的影响,为后续探索草地贪夜蛾对桑园的为害提供理论依据和参考。【方法】利用年龄-龄期两性生命表方法建立取食人工饲料和桑叶的草地贪夜蛾种群,测定其发育历期、产卵量、蛹重和化蛹率等生长发育和繁殖指标,使用两性生命表软件TWOSEX-MS Chart 2024计算种群参数,并进行方差分析及绘制曲线图。利用TIMING-Mschart软件预测取食桑叶和人工饲料草地贪夜蛾种群未来90 d种群动态。【结果】取食桑叶和人工饲料草地贪夜蛾均可完成世代发育,总发育历期分别为44.18(±0.93)、32.30(±0.26)d,幼虫存活率分别为41.17(±5.88)%、55.56(±12.73)%,蛹重分别为174.4(±34.2)、225.9(±23.7)mg/头,单雌产卵量分别为499.58(±278.67)、877.40(±440.79)粒,卵孵化率均为100%。取食桑叶和人工饲料草地贪夜蛾种群内禀增长率分别为0.10(±0.01)、0.14(±0.01)/d,周限增长率分别为1.11(±0.01)、1.16(±0.01)/d,种群净增殖率分别为128.57(±36.37)、250.64(±77.14)粒/头,世代平均周期分别为47.03(±1.42)、37.86(±0.34)d。【结论】取食桑叶和人工饲料草地贪夜蛾均可完成世代发育,与取食人工饲料相比,取食桑叶草地贪夜蛾生长发育速度较慢、发育整齐度低,存活率和产卵量较低。自然条件下,当虫口密度过大或者最适寄主植物缺少时,草地贪夜蛾可能会对桑树构成威胁。【Objective】The study is carried out to explore the effect of mulberry leaf feeding on the growth and development of Spodoptera frugiperda,with an aim to provide a theoretical basis and reference for the potential damage of mulberry gardens caused by S.frugiperda.【Method】The populations of S.frugiperda feeding on artificial diet and mulberry leaves were established by two-sex life tables,and the growth&development and reproductive indexes were measured,including the development duration,oviposition amount,pupal weight and pupation rate.And the population parameters were calculated with the two-sex life table software TWOSEX-MS Chart 2024,followed by ANOVA and graphing.Finally,TIMINGMschart was used to predict the future 90 d population dynamics of S.frugiperda feeding on artificial diet and mulberry leaves.【Result】The total developmental durations of S.frugiperda feeding on mulberry leaves and artificial diet were 44.18(±0.93)and 32.30(±0.26)d,the larval survival rates were 41.17(±5.88)%and 55.56(±12.73)%,the pupal weight were 174.4(±34.2)and 225.9(±23.7)mg per pupa,the oviposition amounts of single female moth were 499.58(±278.67)and 877.40(±440.79),and both of the pupation rate were 100%.The intrinsic rates of increase of S.frugiperda feeding on mulberry leaves and artificial diet were 0.10(±0.01)and 0.14(±0.01)per day,finite rates of increase were 1.11(±0.01)and 1.16(±0.01)per day,net reproduction rates were 128.57(±36.37)and 250.64(±77.14)eggs per single female moth,and mean generation times were 47.03(±1.42)and 37.86(±0.34)days,respectively.【Conclusion】S.frugiperda feeding on mulberry leaves and artificial diet could complete the generation development,and compared with feeding on artificial diet,the growth and development rate of S.frugiperda feeding on mulberry leaves is slower,and the developmental uniformity,the survival rate,and oviposition amount are all lower.In conclusion,under natural conditions,when the population density is too large or the most suitable host plant i

关 键 词：草地贪夜蛾 桑树 生长发育 两性生命表 取食选择 种群参数 

分 类 号：S433.4[农业科学—农业昆虫与害虫防治]