| 徐宇宽1,2, 陈国奇1,2*, 张 琳3, 霍中洋1,2.三氯吡氧乙酸、氯氟吡氧乙酸、2甲4氯和草甘膦对葎草的防除活性比较[J].植物保护,2020,46(4):253-257. |
| 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 |
| 投稿时间：2019-04-26 修订日期：2019-06-05 |
| DOI：10.16688/j.zwbh.2019217 |
| 中文关键词: 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 |
| 英文关键词:Humulus scandens dose-response curve whole-plant bioassay translocated herbicide rice and wheat planting areas |
| 基金项目:国家重点研发计划（2018YFD0300802）;江苏高校优势学科建设工程(PAPD) |
| 作者 | 单位 | E-mail | | 徐宇宽1,2, 陈国奇1,2*, 张 琳3, 霍中洋1,2 | 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 | chenguoqi_21@163.com |
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| 中文摘要: |
| 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/hm2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/hm2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/hm2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(GR50和GR90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GR50分别为58.74、76.96、182.52和272.82 g/hm2; GR90分别为143.97、202.83、678.27和2 980.11 g/hm2。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。 |
| 英文摘要: |
| 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/hm2, triclopyr and fluroxypyr totally killed H.scandens seedlings. At the dose of 420 g/hm2, 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/hm2, glyphosate-isopropylammonium showed an inhibition rate below 80% of the above-ground fresh weight. Logistic regression analyses indicated that the GR50 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/hm2, respectively, and the GR90 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 2 980.11 g/hm2, 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. |
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