| 王正博, 王 豪, 于佳星, 李 俊, 董立尧*.二氯喹啉草酮与二氯喹啉酸的除草活性及对水稻安全性的比较[J].植物保护,2023,49(1):328-333. |
| 二氯喹啉草酮与二氯喹啉酸的除草活性及对水稻安全性的比较 |
| Comparison of herbicidal activity and the safety of quintrione and quinclorac to rice |
| 投稿时间：2021-10-29 修订日期：2022-01-04 |
| DOI：10.16688/j.zwbh.2021601 |
| 中文关键词: 二氯喹啉草酮 二氯喹啉酸 杂草 生物活性 水稻 安全性 |
| 英文关键词:quintrione quinclorac weed bioactivity rice safety |
| 基金项目:国家自然科学基金（31871993） |
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| 中文摘要: |
| 采用整株生物测定法测定两种除草剂二氯喹啉草酮与二氯喹啉酸茎叶处理对水稻田杂草的生物活性及对水稻的安全性。结果表明:当二氯喹啉草酮和二氯喹啉酸有效成分剂量均为600 g/hm2时, 两种除草剂对稗属杂草、鳢肠的鲜重抑制率均高于94%, 其GR90为107.35~558.58 g/hm2; 对马唐和耳叶水苋的鲜重抑制率低于85%, 对抗二氯喹啉酸西来稗和千金子的鲜重抑制率低于50%; 不同的是二氯喹啉草酮对丁香蓼和异型莎草的鲜重抑制率分别为92.17%、94.33%, 均显著高于二氯喹啉酸(83.64%, 85.57%)。二氯喹啉草酮和二氯喹啉酸对1.5叶期水稻安全性差, 选择性指数为2.53~3.58; 对3.5叶期水稻安全, 选择性指数大于4, 各处理水稻鲜重与对照组之间无显著差异。本着高效、安全、经济的原则, 不推荐二氯喹啉草酮用于防除水稻田禾本科杂草, 仅对部分阔叶类和莎草科杂草发生严重的水稻田, 二氯喹啉草酮可以作为补充除草剂。 |
| 英文摘要: |
| The whole-plant bioassay was used to determine bioactivity of quintrione and quinclorac to weeds and its safety to rice seedling in paddy fields in this study. The results indicated that at a dose of 600 g/hm2, the inhibition rates of quintrione and quinclorac to Echinochloa spp . and Eclipta prostrata were higher than 94%, with the GR90 value ranged from 107.35 to 558.58 g/hm2. The inhibition rates to Digitaria sanguinalis and Ammannia auriculata were lower than 85%, and the inhibition rates to Leptochloa chinensis and resistant Echinochloa crus-galli var. zelayensis were lower than 50%, however, the inhibition rates of quintrione on fresh weight of Ludwigia prostrata and Cyperus difformis were 92.17% and 94.33%, respectively, significantly higher than those of quinclorac (83.64%, 85.57%). Quintrione and quinclorac had poor safety to rice seedling at 1.5-leaf stage, with the selectivity indices ranged from 2.53 to 3.58 while they were safe to rice seedling at 3.5-leaf stage, with the selectivity indices higher than 4. There was no significant difference in the fresh weight of rice between each treatment and control group. According to the principle of high efficiency, economy and safety, quintrione is not recommended to control gramineous weeds, but could be a supplementary herbicide only for some broadleaf and cyperaceous weeds in paddy fields. |
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