在将生物农药与秋季军,Spodoptera frugiperda结合起来时,具有对抗性和添加效应
Steven J Harte1, Daniel P Bray2, Victoria Nash-Woolley2,3
1Natural Resources Institute, University of Greenwich, Central Avenue, Chatham Maritime, Kent, ME4 4TB, UK. S.J.Harte@greenwich.ac.uk.
Scientific reports
|March 13, 2024
概括
结合pyrethrum和Beauveria bassiana显示了对秋季军虫 (FAW) 控制的潜力. 特定剂量产生添加效应,克服了综合性害虫管理 (IPM) 单个生物农药的局限性.
科学领域:
- 农业昆虫学 农业昆虫学
- 虫害管理 虫害管理 虫害管理
- 生物农药研究 生物农药研究
背景情况:
- 秋季军虫 (Spodoptera frugiperda,FAW) 是一个主要的全球作物害虫,主要由合成农药控制.
- 像pyrethrum (植物杀虫剂) 和Beauveria bassiana (昆虫病原菌) 这样的生物杀虫剂提供了可持续的替代品,但也有局限性.
- 在紫外线下,Pyrethrum迅速降解;B. bassiana的作用开始缓慢.
研究的目的:
- 评估pyrethrum和B. bassiana的疗效,单独和组合,对抗第三阶段FAW.
- 确定这些生物杀虫剂的组合是否可以减轻它们的个别缺点,以改善FAW控制.
主要方法:
- 测试了四种不同组合的pyrethrum和B. bassiana对第三阶段的FAW.
- 评估了昆虫死亡率和评估了不同度的生物农药之间的相互作用 (对抗性,添加性,协同性).
- 观察到对B. bassiana的疗效和真菌生长的影响.
主要成果:
- 在B. bassiana和pyrethrum的最低测试度下观察到对抗性相互作用.
- 在其他三种联合治疗中发现了附加效应,表明特定剂量的潜在益处.
- 当与pyrethrum结合使用时,B. bassiana疗效的延迟和整体生长抑制被注意到.
结论:
- 结合pyrethrum和B. bassiana的疗效取决于剂量,并不普遍有益或有害.
- 在特定度的添加效应表明,在生物杀虫剂组合中,可以改善持久性和更快的作用.
- 这种方法可以提高生物杀虫剂的有效性,用于针对FAW的综合性害虫管理 (IPM) 战略.
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