4种新型杀虫剂对西花蓟马的室内毒力

摘要

采用浸叶法测定了溴氰虫酰胺、呋虫胺、氟啶虫胺腈、噻虫啉4种新型杀虫剂对西花蓟马2龄若虫的室内毒力,为西花蓟马的防控提供理论依据。结果表明：药剂处理24 h后,10%溴氰虫酰胺OD、20%呋虫胺SG、50%氟啶虫胺腈WG和48%噻虫啉SC对西花蓟马2龄若虫的LC50值分别为5．972、6．644、10．468和27．848 mg/L；药剂处理72 h后,10%溴氰虫酰胺OD、20%呋虫胺SG、50%氟啶虫胺腈WG和48%噻虫啉SC对西花蓟马2龄若虫的LC50值分别为3．522、5．851、9．226和25．726 mg/L,溴氰虫酰胺的毒力较高。%To provide references for prevention and control of western flower thrips,toxicity of four new insecti-cides,i. e. cyantraniliprole,dinotefuran,sulfoxaflor and thiacloprid,against the 2nd instar Frankliniella occi-dentalis were determined by leaf-dipping method in the laboratory. The results showed that LC50 value of 10% cyantraniliprole OD,20% dinotefuran SG,50% sulfoxaflor WG and 48% thiacloprid SC to the 2 nd instar nymph after 48 h treatment were 5. 972 mg/L,6. 644 mg/L,10. 468 mg/L and 27. 848 mg/L,respectively. After 72 h,the LC50 value decreased to 3. 522 mg/L,5. 851 mg/L,9. 226 mg/L and 25. 726 mg/L,respective-ly. Therefore,the toxic effect of 10% cyantraniliprole OD against the 2 nd instar nymph of western flower thrips was the best.