摘要
【目的】明确飞机草浸提液对斜纹夜蛾生长发育和繁殖的影响。【方法】在实验室内利用不同浓度的飞机草水浸提液处理香蕉叶后喂养斜纹夜蛾幼虫,并观察记录斜纹夜蛾的生长发育情况。【结果】随着飞机草浸提液浓度的升高,斜纹夜蛾幼虫和蛹的发育历期逐渐延长,蛹重逐渐降低;母液处理下的幼虫和蛹发育历期最长,分别比对照处理延长了7.92和2.88 d,母液处理下的蛹重最轻,较对照降低了25.4%;飞机草浸提液处理降低了斜纹夜蛾低龄幼虫的存活率,对高龄幼虫和蛹的存活率影响不显著。随着飞机草浸提液浓度的升高,斜纹夜蛾种群净增值率R_(0)、内禀增长率r_(m)和周限增长率λ均逐渐降低,种群平均世代周期T和种群加倍时间t逐渐延长。【结论】飞机草对斜纹夜蛾具有一定的生防潜力,可应用于斜纹夜蛾的生物源农药开发研究。
【Aim】To understand the effect of Chromolaena odorata extract on the growth and reproduction of Spodoptera litura.【Method】In the laboratory,banana leaves were treated with different concentrations of aqueous extracts of C.odorata were used to feed S.litura larvae.The growth and development of S.litura were observed and recorded.【Result】With increasing concentrations of C.odorata extract,the development duration of larvae and pupae of S.litura gradually increased,and the weight of pupae gradually decreased.The development durations of larvae and pupae were the longest under the mother liquor(50 mg·mL^(-1))treatment and compared with the control group were prolonged by 7.92 and 2.88 days,respectively.The pupae treated with the mother liquor had the lowest weight,which decreased by 25.4%compared with the control group.The survival rate of the young instar larvae of S.litura decreased with C.odorata extract,and there was no significant effect on the survival rate of old instar larvae and pupae.With an increase in the concentration of C.odorata extract,the net reproductive rate(R_(0)),intrinsic rate of increase(r_(m)),and finite rate of increase(λ)of S.litura gradually decreased,and the mean generation time(T)and doubling time(t)gradually increased.【Conclusion】C.odorata has a certain potential in the biological control of S.litura,and can be used in the development of biological pesticides for S.litura.
作者
杜浩
只佳增
赵丽娟
周劲松
刘学敏
DU Hao;ZHI Jiazeng;ZHAO Lijuan;ZHOU Jingsong;LIU Xuemin(Honghe Research Institute of Tropical Agriculture,Hekou,Yunnan 661300,China)
出处
《生物安全学报》
CSCD
北大核心
2022年第2期151-155,共5页
Journal of biosafety
基金
云南省科技人才与平台计划(202005AD160004)
云南省转制科研院所技术开发研究专项(202104AR040006)。
关键词
斜纹夜蛾
飞机草
生长发育
种群参数
Spodoptera litura
Chromolaena odorata
growth and development
population parameter
