联苯肼酯对柑橘全爪螨的毒力测定及田间防效  

Toxicity test and field efficacy of bifenazate against Panonychus citri McGregor

作　　者：徐淑[1] 陈凯歌[1] 余瑶[1] 陈耿民[1] 陈炳旭[1] 

机构地区：[1]广东省农业科学院植物保护研究所,广东省植物保护新技术重点实验室,广州510640

出　　处：《植物保护》2014年第5期191-195,共5页Plant Protection

基　　金：公益性行业(农业)科研专项(201103020)

摘　　要：用 Potter 喷雾法测定了联苯肼酯对柑橘全爪螨的室内毒力，并通过田间药效试验评价了联苯肼酯对柑橘全爪螨的防治效果。结果表明，联苯肼酯对柑橘全爪螨的 LC50为95．37 mg/L、对照药剂哒螨灵的 LC50为228．09 mg/L，联苯肼酯的毒力为哒螨灵的2．39倍。2011-2012年田间药效试验表明，药后1 d，43％联苯肼酯悬浮剂165、195、239 mg/kg 处理的防效为50％～60％，明显低于15％哒螨灵乳油75 mg/kg 处理的防效；药后3 d，43％联苯肼酯悬浮剂239 mg/kg 处理的防效达到75％以上，与15％哒螨灵乳油的防效相当；药后15 d，195、239 mg/kg 处理的防效为88．63％～91．23％，显著高于15％哒螨灵乳油的防效。本试验表明，43％联苯肼酯悬浮剂对柑橘全爪螨的速效性较差，但持效期长，药效可持续15 d，是防治柑橘全爪螨的较好药剂之一。Toxicity and field control effect of bifenazate against Panonychus citri McGregor were evaluated by Potter-spraying method and field experiments.The results showed that the LC50 values of bifenazate and pyrid-aben were 95.37 mg/L and 228.09 mg/L,respectively,and the toxicity index of bifenazate was 2.39.The field experiments conducted in 2011 -2012 showed that the control effect of 43% bifenazate suspension was 50% to 60% at the concentration of 165,195,239 mg/kg one day after treatment,significantly lower than that of 15%pyridaben emulsifiable concentrate at the concentration of 75 mg/kg （about 70%）.Three days after treatment, the control effect of 43% bifenazate at the concentration of 239 mg/kg was equivalent with that of 15% pyrid-aben,with control efficacy of over 75%.After fifteen days,the control effect of 43% bifenazate at the concen-tration of 195,239 mg/kg were 88.63% - 91 .23%,significantly higher than that of 15% pyridaben emulsifiable concentrate.These results demonstrated that 43% bifenazate was one of the ideal acaricides against P .citri ,which took effect later than 15% pyridaben,but had more persistent control effect with persistence pe-riod of 15 days.

关 键 词：联苯肼酯 柑橘红蜘蛛 毒力 田间防效 

分 类 号：S436.661.23[农业科学—农业昆虫与害虫防治]