虱螨脲及其复配制剂对环境昆虫的急性毒性和风险评估

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中图分类号：S482.3 文献标识码：A 文章编号：1006-060X（2025）05-0072-07

引用格式：李伟，卢赛男，石璞，等.虱螨脲及其复配制剂对环境昆虫的急性毒性和风险评估[J].湖南农业科学，2025（5）：72-78.DOI：10.16498/j.cnki.hnnykx.2025.005.014

Abstract：Thisstudyaimstodeterminethetoxicefectsandrisksoflufenuronanditsompoundpreparationstothreeenviroental insectspeciesteicittooactfo）oellecatactdd Apis mellifera （feeding method and drip method） was tested. The median lethal rate （LR50） and median lethal dose （LD50） were calculated， and the risks were assessed with consideration to the recommended dosages in the field.Theresults showed that 15% lufenuron SC， 20% （20号 thiamethoxam + lufenuron SC， 30% chlorfenapyr + lufenuron SC，and 12% avermectin + lufenuron SC had the LR50 of >100 ，59.79，14， and 6.21g a.i. ℏm2 on C. septempunctata and29，58，0.44，and 3.32ga.i./hm2 on T. japonicum，respectively. The four treatmentsshowed the LD50 of 35.470， 0.022，3.330， and 0.080μg a.i./bee，respectively，foracuteoral toxicity on A .mellifera，demonstratinglow，igh，moderte， and high toxicity， respectively. The four treatments showed the LD50 of >100 ，0.026，390，and 0.004μg a.i./bee，respectively， for acute contact toxicity on A mellifera，withlow，high，high，andhigh toxicity，respectively.Theriskassessmentresultsshowedthat 15% lufenuron SC was only unacceptable for T. japonicum in the farmland， and 20% thiamethoxam + lufenuron SC was acceptable for C. septempunctata. Outside the farmland， 30% chlorfenapyr + lufenuron SC was acceptable for C⋅ ，septempunctata， and 12% avermectin + lufenuron SC was acceptable for C. septempunctata and T. japonicum.Therefore，during the fowering period of plants，compound preparations of lufenuron shouldbavoddasuchaspoibleandthseoffenonditsompoudpreparatiosinthaseareaofasituales shouldbeprohibited.Inthereleaseareaof predatorynatural enemies， 15% lufenuron SC and 20% thiamethoxam + lufenuron SC can beused inmoderation.

Keywords：lufenuron;Coccinellaseptempunctata;Trichogramma japonicum;Apismellifera;toxicity;riskassessment

随着农业生产效率的不断提升，农作物种植密度增加、连作现象普遍，导致害虫危害日趋严重，对农业生产构成巨大威胁。（剩余12565字）