茶叶通讯2026，Vol.53Issue(1)：58-63,6.DOI:10.20178/j.cnki.ISSN1009-525X.2026.01.007
茶园常用杀虫剂除虫菊素对非靶标生物的急性毒性研究
Acute Toxicity of Pyrethrins,a Common Insecticide in Tea Plantations,to Non-target Organisms
摘要
Abstract
To evaluate the ecological risks of 1.5%pyrethrins emulsion,a commonly used insecticide in tea plantations,its acute toxicity to non-target organisms(Japanese quail Coturnix japonica,Italian honeybee Apis mellifera,silkworm Bombyx mori,Asian corn borer egg parasitoid Trichogramma ostriniae,and seven-spotted ladybird Coccinella septempunctata)was tested in accordance with relevant national standards.The results showed that the 7-day oral LD50 for Japanese quail was>149 mg a.i./kg bw(moderately low toxicity),while the 48-hour oral and contact LD50 for Italian honeybees were 0.382 μg a.i./bee and 0.294 μg a.i./bee(highly toxic).The 96-hour LC50 for silkworms was 0.291 mg a.i./L(extreme toxic).For natural enemies,the 24-hour LR50 for T.ostriniae was 1.82 g a.i./ha,and the 15-day LR50 for C.septempunctata was 188 g a.i./ha.Acute risk assessment indicated that pyrethrins posed unacceptable risks to honeybees,silkworms,and T.ostriniaeat,while risks to quails and ladybirds were acceptable.Despite being classified as a low-toxicity pesticide,pyrethrins exhibit high acute risks to key tea plantation biocontrol agents(T.ostriniae),pollinators(A.mellifera),and silkworms.To mitigate ecological exposure,field applications should avoid peak activity periods of natural enemies and bee foraging,with priority given to precision spraying techniques.关键词
茶园/除虫菊素/非靶标生物/毒性Key words
Tea plantatitons/Pyrethrins/Non-target organisms/Toxicity分类
农业科技引用本文复制引用
刘诗诗,吴雨婷,谭少波..茶园常用杀虫剂除虫菊素对非靶标生物的急性毒性研究[J].茶叶通讯,2026,53(1):58-63,6.基金项目
国家现代农业产业技术体系广西茶叶产业创新团队(nycytxgxcxtd-2024-18-03),广西特色作物试验站(TS202126),广西农业科技自筹经费项目(Z2023014) （nycytxgxcxtd-2024-18-03）
