双氟磺草胺与2甲4氯异辛酯的联合作用及药效评价  

Evaluation on Drug Effect of Joint Action of Florasulam and MCPA-isooctyl

作　　者：高新菊[1] 王恒亮[1] 陈威[1] 马毅辉[1] 李清波 贾刚民[1] 杨党伟[1] 孙祥龙[1] 

机构地区：[1]河南省农业科学院植物保护研究所/河南省农作物病虫害防治重点实验室/农业部华北南部作物有害生物综合治理重点实验室,河南郑州450002 [2]平顶山市农业局,河南平顶山467000

出　　处：《河南农业科学》2015年第2期77-81,共5页Journal of Henan Agricultural Sciences

基　　金：河南省农业科学院自主创新专项基金项目;河南省博士后科研项目(2013046)

摘　　要：为明确双氟磺草胺与2甲4氯异辛酯复配除草的联合作用类型及在小麦田应用的可行性,采用室内生物测定和田间药效试验,研究了双氟磺草胺与2甲4氯异辛酯对播娘蒿、荠菜的联合毒力,对当茬小麦的安全性及田间除草效果。结果表明,双氟磺草胺与2甲4氯异辛酯混用对播娘蒿、荠菜的杀灭活性均为加成作用,二者配比在1∶105附近比较适宜。42.4%双氟磺草胺·2甲4氯异辛酯油悬浮剂（混配比例为1∶105）对当茬作物小麦的安全性较好,不同剂量处理区小麦产量与人工除草区均无显著差异。该药剂有效剂量480~640 g/hm2对小麦田阔叶杂草防除效果较好,施药后40 d株防效和鲜质量防效均在90%以上。综合分析,双氟磺草胺与2甲4氯异辛酯复配效果显著,对小麦使用安全。Dose-response experiments were conducted to determine the combination activity type of florasulam and MCPA-isooctyl by using the method of Gowing in greenhouse. Weed control effect,and response of winter wheat to different dosages of 42. 4% florasulam ＋ MCPA-isooctyl SE were also investigated in fields. The results showed that they exhibited a synergistic effect on control of the grasses,Descurainia sophia and Capsella bursa-pastoris,and the ratio of 1 ∶ 105 was the best. The 42. 4% florasulam ＋MCPA-isooctyl SE did not cause injury to wheat. The 42. 4% florasulam ＋ MCPA-isooctyl SE achieved high weed control effect when applied with 480—640 g / ha in winter wheat fields. Quantity and fresh weights of weeds were reduced by more than 90% at 40 days after application of the drug. By comprehensive analysis,the weed control effect of florasulam ＋ MCPA-isooctyl was significant,and it was safe to wheat.

关 键 词：双氟磺草胺 2甲4氯异辛酯 小麦 安全性 联合作用 阔叶杂草 药效 

分 类 号：S451.221[农业科学—植物保护]