22%噻虫嗪·高效氯氟氰菊酯悬浮剂对环境非靶标生物的急性毒性与风险评估

Determination of Thiamethoxam·Lambda-cyhalothrin 22%SC by UPLC-MS/MS and Its Acute Toxicity and Risk Assessment to Environmental Non-target Organisms

建立了基于UPLC-MS/MS法测定曝气自来水和BG11培养基中噻虫嗪、高效氯氟氰菊酯的定性定量分析方法,测定了22%噻虫嗪·高效氯氟氰菊酯悬浮剂对环境5种非靶标生物的毒性并分级。结果表明,22%噻虫嗪·高效氯氟氰菊酯悬浮剂对斑马鱼、大型溞和家蚕的毒性为剧毒;对蜜蜂的毒性为高毒;分别以生长率抑制率和生物量增长抑制率为毒性终点计时,对羊角月牙藻的毒性分别为低毒和中毒。22%噻虫嗪·高效氯氟氰菊酯悬浮剂对蜜蜂和家蚕均存在潜在风险。建议实际施用过程注意周围开花植物花期,蚕室及桑园附近禁用。

A qualitative and quantitative method for the determination of thiamethoxam and lambda-cyhalothrin in erated tap water and BG11 medium by UPLC-MS/MS.The toxicity of thiamethoxam·lambda-cyhalothrin to five non-target organisms in the environment was determined and graded.The results showed that the toxicity of thiamethoxam·lambda-cyhalothrin 22%SC to Danio rerio,Daphnia magna and Bombyx mori were highly toxic.The toxicity to bees was high toxicity.Based on the inhibition rate of growth rate and the inhibition rate of biomass growth,the toxicity to Pseudokirchneriella subcapitata were low and medium toxicity,respectively.The results of risk assessment showed that the risk to bees and silkworms were unacceptable.During the actual application process,pay attention to the prohibition of the application on surrounding flowering plants and in the vicinity of the silkworm house and mulberry garden.