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在不同的宿主中,Spodoptera frugiperda (Lepidoptera:Noctuidae) 菌株的生存和发育:对抗性管理的影响
Larissa Pasqualotto1, Juarez da Silva Alves1, Rubens Antonio Polito1
1Plant Health Department, Federal University of Pelotas (UFPel), Pelotas, Rio Grande do Sul, Brazil.
Environmental entomology
|February 5, 2026
概括
秋季军 (Spodoptera frugiperda) 可以在各种非Bt玉米作物上生存和繁殖,加速耐药性进化. 这凸显了在休季期间管理替代宿主植物以控制害虫种群的重要性.
科学领域:
- 昆虫学 昆虫学是一门学科.
- 虫害管理 虫害管理 虫害管理
- 农业科学 农业科学
背景情况:
- 秋季军 (Spodoptera frugiperda) 对Bt玉米表现出耐药性.
- 在作物非季节期间,在替代宿主上的生存可能会推动耐药性进化.
- 了解宿主植物的适合性对于管理害虫种群至关重要.
研究的目的:
- 评估覆盖作物的秋季军虫菌株 (SS,RS,RR) 的生物参数和生育能力.
- 评估不同宿主植物对S. frugiperda生命周期和繁殖的影响.
- 确定替代宿主在加速Bt抗性的作用.
主要方法:
- 繁殖易感 (SS),异合体 (RS) 和耐药 (RR) 的 S. frugiperda 菌株.
- 幼虫在各种覆盖作物上食:花园草,白麦,麦,非Bt玉米,麦和波斯三叶草.
- 分析生命表的参数:卵到成年人的生存率,生殖时间,生殖率 (Ro) 和内在增长率 (rm).
主要成果:
- 在Barnyardgrass上,S. frugiperda没有生存下来.
- 白麦,麦和非Bt玉米支持30天的生长周期,繁殖率高 (Ro=496.2-578.1,rm=0.143-0.185).
- 和波斯三叶草延长了周期,使生命力降低了13%,降低了生殖和生长率.
结论:
- 除了Barnyardgrass外,所有评估的宿主植物都促进了S. frugiperda的繁殖.
- 这些宿主使得在玉米季外期间的害虫恢复,加速Bt耐药性.
- 替代宿主植物的管理对于可持续的秋季军虫控制至关重要.
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