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采用点滴法比较了甲维盐、虫螨腈、茚虫威、虫酰肼、毒死蜱、灭多威对甜菜夜蛾和斜纹夜蛾3龄幼虫的室内毒力,以及酶抑制剂与防治甜菜夜蛾和斜纹夜蛾杀虫剂的互作效应。结果表明,甲维盐、虫螨腈、茚虫威对2种试虫毒力较高,LC50值介于0.69~16.32μg/g之间;虫酰肼对甜菜夜蛾毒力较高,LC50值为37.66μg/g;毒死蜱对斜纹夜蛾毒力较高,LC50值为20.71μg/g。酶抑制剂PBO、TPP、DEM、SV1在甜菜夜蛾和斜纹夜蛾上对虫螨腈和茚虫威均表现为抑制作用,增效比在0.25~0.96之间;而这4种酶抑制剂在甜菜夜蛾上对甲维盐和虫酰肼以及在斜纹夜蛾上对甲维盐和毒死蜱表现为增效作用,除SV1在斜纹夜蛾上对毒死蜱增效倍数高达16.20外,其它组合增效倍数均介于1.22~4.20之间。
The toxicity of carbaryl, chlorfenapyr, indoxacarb, tebufenozide, chlorpyrifos and methomyl on the 3rd instar larvae of beet armyworm and Spodoptera litura were compared by using the dropping-point method, and the effects of enzyme inhibitors and sugar beet Interaction between Moths and Spodoptera insecticides. The results showed that carbaryl, chlorfenapyr and indoxacarb had high virulence to two test species with LC50 ranging from 0.69 to 16.32 μg / g; tebufenozide had higher virulence to beet armyworm, LC50 Value of 37.66μg / g; chlorpyrifos higher toxicity to Spodoptera litura, LC50 value of 20.71μg / g. The enzyme inhibitors PBO, TPP, DEM and SV1 showed inhibitory effects on both carmellose and indoxacarb in beet armyworm and Spodoptera litura, with a synergistic ratio of 0.25-0.96. These four enzyme inhibitors The beet armyworm showed synergistic effects on the carbaryl and tebufenozide and on the Spodoptera litura on carbendazim and chlorpyrifos. In addition to SV1, the synergistic ratio of chlorpyrifos on Spodoptera litura was as high as 16.20, Effective times are between 1.22 ~ 4.20.