三氯吡氧乙酸、氯氟吡氧乙酸、2甲4氯和草甘膦对葎草的防除活性比较  

Comparisons on the efficacy of triclopyr,fluroxypyr,MCPA and glyphosate against Humulus scandens

作　　者：徐宇宽 陈国奇 张琳 霍中洋 XU Yukuan;CHEN Guoqi;ZHANG Lin;HUO Zhongyang(Jiangsu Key Laboratory of Crop Genetics and Physiology,Jiangsu Key Laboratory of Crop Cultivation and Physiology,Agricultural College of Yangzhou University,Research Institute of Rice Industrial Engineering Technology,Yangzhou 225009,China;Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops,Yangzhou University,Yangzhou 225009,China;Shanghai Qingpu District Agricultural Technology Extension Service Center,Shanghai 201700,China)

机构地区：[1]江苏省作物遗传生理重点实验室,江苏省作物栽培生理重点实验室,扬州大学农学院,水稻产业工程技术研究院,扬州225009 [2]江苏省粮食作物现代产业技术协同创新中心,扬州大学,扬州225009 [3]上海青浦区农业技术推广服务中心,上海201700

出　　处：《植物保护》2020年第4期253-257,共5页Plant Protection

基　　金：国家重点研发计划(2018YFD0300802);江苏高校优势学科建设工程(PAPD)。

摘　　要：本文通过温室整株生物测定法比较研究了三氯吡氧乙酸、氯氟吡氧乙酸、2甲4氯钠和草甘膦异丙胺盐4种常用于水稻、小麦种植区防控大龄阔叶杂草的茎叶处理除草剂对6~8叶期葎草Humulus scandens的防除活性。结果表明,在210 g/hm^2剂量下,三氯吡氧乙酸和氯氟吡氧乙酸可完全杀灭供试葎草植株,在420 g/hm^2剂量下,2甲4氯钠对葎草的鲜重抑制率达到95.25%,而草甘膦异丙胺盐840 g/hm^2剂量处理对葎草的鲜重抑制率仍不足80%。进一步通过Logistic曲线模型分析除草剂对葎草鲜重抑制率达到50%和90%的剂量(GR 50和GR 90剂量)发现,三氯吡氧乙酸、氯氟吡氧乙酸、2甲4氯钠和草甘膦异丙胺盐相应的GR 50分别为58.74、76.96、182.52和272.82 g/hm^2;GR 90分别为143.97、202.83、678.27和2980.11 g/hm^2。结论:对于水稻、小麦种植区葎草危害,优先推荐使用三氯吡氧乙酸防除,其次是氯氟吡氧乙酸;使用2甲4氯防控效果不够理想,使用草甘膦无法有效控制。The efficacies of four post-emergence herbicides against Humulus scandens seedlings with 6-8 leaves,including triclopyr,fluroxypyr,MCPA-Na and glyphosate-isopropylammonium,which are commonly used for controlling broadleaf weeds in rice and wheat planting areas,were investigated by whole-plant bioassay.The results indicated that at the dose of 210 g/hm^2,triclopyr and fluroxypyr totally killed H.scandens seedlings.At the dose of 420 g/hm^2,MCPA-Na killed most H.scandens seedlings with an inhibition rate of 95.25%of the above-ground fresh weight.However,at the dose of 840 g/hm^2,glyphosate-isopropylammonium showed an inhibition rate below 80%of the above-ground fresh weight.Logistic regression analyses indicated that the GR 50 doses(the effective doses of herbicide causing 50%reduction of aboveground fresh weight)for triclopyr,fluroxypyr,MCPA-Na and glyphosate-isopropylammonium were 58.74,76.96,182.52 and 272.82 g/hm^2,respectively,and the GR 90 doses(the effective doses of herbicide causing 90%reduction of aboveground fresh weight)for the four herbicides were 143.97,202.83,678.27 and 2980.11 g/hm^2,respectively.In conclusion,triclopyr is the preferred candidate for to H.scandens control in rice and wheat planting areas,followed by fluroxypyr,while MCPA or glyphosate is not recommended.

关 键 词：葎草 剂量反应曲线 整株生物测定 内吸传导型除草剂 稻麦种植区 

分 类 号：S451.2[农业科学—植物保护]