Control Effects of 21% Etofenprox · Pymetrozine SC to Sogatella furcifera and Its Safety to Major Spiders in Paddy Field

SHU Zhao-lin1,MIAO Kang1,ZHAO Lai-cheng1,JI Mu-xiang1,FANG Ji-chao2,GUO Hui-fang2,LIU Bao-sheng2(1.Zhenjiang Institute of Agricultural Sciences in Hilly Region of Jiangsu Province,Jurong 212400,China;2.Institute of Plant Protection,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China)

Etofenprox · Pymetrozine;Sogatella furcifera;Control effect;Spider;Safety

The control effects of 21% Etofenprox · Pymetrozine SC to Sogatella furcifera and its safety to major spiders in paddy field were tested.The results showed that the control effect of 21% Etofenprox · Pymetrozine SC at the dosage of 375~600 mL/hm2 against Sogatella furcifera was 72.14%~82.87%,95.89%~97.07%,95.69%~97.52% respectively on the first day,7th day,21st day after spraying,which was better than or similar to that of Permethrin and Pymetrozine.The application of 21% Etofenprox · Pymetrozine SC 375~600 mL/hm2 had great killing effect on micro-spider,little effect on tarantula,while basically no effect on theridiid.Therefore,applying 21% Etofenprox · Pymetrozine SC 375~600 mL/hm2 had high,quick and long control effects against Sogatella furcifera on rice,and was safe to the main spiders in paddy field.The optimum dosage of applying 21% Etofenprox · Pymetrozine SC was 375 mL/hm2,and the optimal time of applying 21% Etofenprox · Pymetrozine SC was at the peak stage of 1~3 instar nymphs of Sogatella furcifera.