多种农药对捕食者的威胁:对Orius nagaii的毒性和次致命影响
Zhenjuan Yin1, Shan Zhao2, Qimei Li3
1Institute of Entomology, Guizhou University, Guizhou Key Laboratory of Agricultural Biosecurity, Guiyang 550025, China; Key Laboratory of Natural Enemies Insects, Ministry of Agriculture and Rural Affairs, Jinan 250100, China.
Pesticide biochemistry and physiology
|December 29, 2025
概括
这项研究揭示了像赛珀素,阿弗梅克丁和硫亚这样的杀虫剂会伤害有益的昆虫,特别是掠食昆虫Orius nagaii. 即使在低于致命的剂量下,这些化学物质也会破坏掠食,繁殖和排毒,影响农业生态系统.
科学领域:
- 农业昆虫学 农业昆虫学
- 生态毒理学 生态毒理学
- 昆虫生理学 昆虫生理学
背景情况:
- 在农业中使用农药对非目标生物构成风险,包括有益的昆虫.
- (Orius nagaii) 是许多农业生态系统的关键捕食者,对生物害虫控制至关重要.
研究的目的:
- 评估甲,阿弗梅克丁和硫亚对Orius nagaii.i.的影响.
- 研究对毒性,捕食,繁殖和排毒机制的影响.
主要方法:
- 对每个农药进行了急性毒性测试.
- 分析了捕食行为,生殖产量 (卵子生产) 和肠道形态.
- 量化了与排毒相关的基因表达和酶活动 (GST,POD,Doux,SOD,CAT,CYP基因).
主要成果:
- 所有测试的农药都对O. nagaii产生了重大影响,其中cypermethrin是最有毒的.
- 农药暴露降低了捕食效率和繁殖成功,特别是蛋生产.
- 观察到排毒酶和CYP基因 (CYP6A2,CYP6B7,CYP301A1,CYP4C1) 的差异调节,表明了不同的排毒反应.
结论:
- 甲,阿弗梅克丁和硫甲对有益的捕食者O. nagaii. 构成重大风险.
- 农药的应用破坏了自然敌人的基本生态功能.
- 合理的农药管理对于在综合性害虫管理 (IPM) 中保护有益昆虫种群至关重要.
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