摘要
【目的】研究溴氰虫酰胺对斜纹夜蛾Spodoptera litura Fabricius亲代和F1代生长发育和繁殖的影响.【方法】采用浸叶法,确定溴氰虫酰胺对斜纹夜蛾3龄幼虫的的亚致死剂量LC20和LC40,分别用该剂量处理斜纹夜蛾3龄幼虫,观察其对斜纹夜蛾亲代和F1代的亚致死效应.【结果和结论】经溴氰虫酰胺LC20剂量0.04 mg·L-1和LC40剂量0.07 mg·L-1处理斜纹夜蛾3龄初期幼虫72 h,与对照相比,幼虫从3龄到6龄的发育历期分别延长了2.39和4.32 d,化蛹率(分别为78.67%和60.33%)和羽化率(分别为72.12%和61.28%)均显著降低,处理组雌、雄蛹质量均增加.LC40处理组的单雌产卵量(1 356.67粒)和卵孵化率(59.26%)显著低于对照,而LC20处理组的单雌产卵量和孵化率则与对照组差异不显著.药剂处理对蛹历期、成虫历期以及雌性比均没有显著影响.溴氰虫酰胺处理也同样延长了斜纹夜蛾F1代幼虫的发育历期,降低了化蛹率,但对F1代羽化率和单雌产卵量影响不大.研究结果可以为斜纹夜蛾的综合防治以及溴氰虫酰胺的合理使用提供理论依据.
Objective To study the effects of sublethal doses cyantraniliprole on the development and re-production of Spodoptera litura in parental and F1 generations.[Method] The sublethal doses including both LC20 and LC40 were estimated by the leaf-dipping method and the sublethal effects were investigated in parental and F1 generations under laboratory conditions .[Result and conclusion] When the 3rd instar S.litura larvae were exposed to LC 20 and LC40 of cyantraniliprole on an arum leave , Colocasia esculenta （ L.） Schott for 72 h, the larvae duration from 3rd instar to 6th instar period increased by 2.39 and 4.32 d respectively , and the pupation rate （ 78.67%, 60.33%） and emergence rate （ 72.12%, 61.28%） were significantly lower than those of the control groups .Meanwhile , both the male and female pupal mass increased .Compared to the control groups , the laid eggs per female and the hatched rate signifi-cantly reduced in the LC 40 group, but those did not occur in the LC 20 group.No significant differences in pupal duration, sex ratio, and longevity of adults were observed in the treatment exposed to LC 20 or LC40 dosages.The parent S.litura exposed to LC20 and LC40 doses of cyantraniliprole also extended the develop-ment duration in F 1 generation larvae and reduced the pupation rate , with no significant influence on the e-mergence rate and the laying eggs per female .These results provide the theoretical basis for developing in-tegrated pest management program for S.litura and the rational use of cyantraniliprole .
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2014年第5期64-68,共5页
Journal of South China Agricultural University
基金
广东省科技计划项目(2012A020100009)
关键词
溴氰虫酰胺
斜纹夜蛾
亚致死剂量
生长发育
繁殖
cyantraniliprole
Spodoptera litura
sublethal dose
growth and development
reproduction
