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.
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)
出处
《植物保护》
CAS
CSCD
北大核心
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)。
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
Humulus scandens
dose-response curve
whole-plant bioassay
translocated herbicide
rice and wheat planting areas
