摘要
利用连续摄入法和初始摄入法分别测定了溴氰菊酯、氰戊菊酯、三氟氯氰菊酯和高效氯氰菊酯4种温室常用菊酯类农药对小峰熊蜂的24、48h毒力。结果表明:连续摄入法测得4种农药对小峰熊蜂24h的致死中浓度分别为404.982、804.177、472.999、346.799mg/L,48h的致死中浓度分别为108.130、193.225、93.983、126.429mg/L;初始摄入法测得4种菊酯类农药对小峰熊蜂24h的致死中浓度分别为493.231、935.223、509.533、579.203mg/L,48h的致死中浓度分别为419.744、677.609、477.389、488.423mg/L。初始摄入法测得的LC50值均不同程度高于连续摄入法。比较不同方法所得到的24、48h的LC50值发现,杀虫剂在连续摄入法中的毒性累积作用明显强于初始摄入法。
The acute toxicity of four pyrethroids pesticides（deltamethrin, fenvalerate, cyhalothrin and beta-cypermethrin） to Bombus hypocrita were assessed by consecutive（bees were fed with contaminated sugar during the whole test） and initial acute oral （contaminated sugar were only fed to bees at the first 2 hours of the test） toxicity tests. The results showed that the LC50 （24 h） for Bombus hypocrita were 404.982, 804.177, 472.999 and 346.799 mg/L for consecutive acute oral test respectively, 24 h later, the LC50 for 48 h were changed to 108.130, 193.225, 93.983 and 126.429 mg/L respectively. At the same time, the LC50 were 493.231,935.223,509.533 and 579.203 mg/L for initial acute oral respectively during 24 h and the LC50 for 48 h were changed to 419.744, 677.609, 477.389 and 488.423 mg/L respectively. The results suggested that the toxicity of pesticides for consecutive acute oral was higher than for initial, and this may be benefit to nontarget organisms if this method was adopted for pesticides registration. At the same time, the results also indicated that the accumulation of the toxicity in consecutive test was higher than in initial.
出处
《农药》
CAS
北大核心
2009年第12期909-911,共3页
Agrochemicals
基金
中央级公益性科研院所基本科研业务费专项资金
公益性行业(农业)科研专项经费项目(nyhyzx07-041)
国家蜜蜂产业技术体系建设专项经费
