| 饶 镭1, 邹子玉1, 刘 浪2, 罗 娟1, 李保同1*.50%双环磺草酮悬浮剂及其混剂对移栽稻田杂草的防效和安全性[J].植物保护,2022,48(3):312-320. |
| 50%双环磺草酮悬浮剂及其混剂对移栽稻田杂草的防效和安全性 |
| The control effect and safety of benzobicyclon 50% SC and its mixture on the weeds in transplanted rice fields |
| 投稿时间：2021-01-30 修订日期：2021-03-05 |
| DOI：10.16688/j.zwbh.2021066 |
| 中文关键词: 双环磺草酮 五氟磺草胺 苄嘧磺隆 防效 安全性 |
| 英文关键词:benzobicyclon penoxsulam bensulfuron methyl control efficacy safety |
| 基金项目:“十三五”国家重点研发计划（2017YFD0301604）；江西省科技支撑计划（20151BBF60070）;江西省农业（水稻）产业技术体系项目（JXARS-02） |
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| 中文摘要: |
| 为明确50%双环磺草酮SC及其混剂35%双环磺草酮·五氟磺草胺·苄嘧磺隆SC对稻田主要杂草的防治效果及其安全性,采用茎叶喷雾法试验了50%双环磺草酮SC及其混剂对杂草的防效和对供试籼稻和粳稻生长的安全性。结果表明:50%双环磺草酮SC施用剂量为300 g/hm2时,药后35 d杂草株防效为65.38%～90.79%,对供试籼稻和粳稻安全,当使用剂量增加到487.5 g/hm2时,对供试籼稻‘泰丰优736’产生明显药害,水稻植株叶片白化枯死,植株较矮,分蘖数少;当使用剂量增加到600 g/hm2时,供试粳稻(‘甬优1538’)发生轻微药害,而当使用剂量增加到975 g/hm2时,供试籼稻发生严重药害,药害率和死亡率分别为58.83%～68.59%和44.17%～62.18%,减产75.48%～75.55%;有13.89%～19.08%的供试粳稻产生药害,减产19.35%～21.70%。双环磺草酮单独施用时对稻田杂草具有较好的防治效果,但对水稻安全性较差,不适合在籼稻田施用,在粳稻田的推荐施用量为300～487.5 g/hm2。35%双环磺草酮·五氟磺草胺·苄嘧磺隆SC在210～315 g/hm2施用剂量下对供试籼稻和粳稻安全,药后15 d和35 d对稻田阔叶类杂草和其他杂草的株防效和鲜重防效均在92%以上,对禾本科杂草的株防效和鲜重防效分别在77.86%～98.52%和76.85%～94.98%,对供试籼稻和粳稻品种均具有一定的增产效果,与空白对照相比,分别增产5.31%～23.77%和19.78%～26.88%。本着高效经济安全的原则,35%双环磺草酮·五氟磺草胺·苄嘧磺隆SC在稻田推荐用量为210～262.5 g/hm2,于水稻移栽后杂草萌发期施用。 |
| 英文摘要: |
| In order to clarify the control effect and safety of benzobicyclon 50% SC and its mixture benzobicyclon·penoxsulam·bensulfuron-methyl 35% SC on the main weeds in paddy fields, a stem and leaf spray method was used to test the control effect of benzobicyclon 50% SC and its mixture on weeds and its safety on the growth of indica and japonica rices. The results showed that, when benzobicyclon 50% SC was applied at a dose of 300 g/hm2, the control effect on weed plants was 65.38% to 90.79% 35 days after the treatment, which was safe for the tested indica and japonica rices. When the dose increased to 487.5 g/hm2, the tested indica rice ‘Taifengyou 736’ showed obvious phytotoxic symptoms: the leaves of rice plants were bleached and died, and the plants were dwarf, and the number of tillers was small; when the dosage was increased to 600 g/hm2, the tested japonica rice ‘Yongyou 1538’ exhibited slight phytotoxic symptoms; when the dosage was increased to 975 g/hm2, the tested indica rice suffered serious phytotoxicity, with an injury rate and mortality of 58.83%-68.59% and 44.17%-62.18%, respectively, and the yield was reduced by 75.48%-75.55%. In contrast, the tested japonica rice showed an injury rate of 13.89%-19.08%, and the yield was reduced by 19.35%-21.70%. Benzobicyclon alone had a good control effect on rice field weeds, but with a poor level of safety on rice. It is not suitable for application in indica rice fields. The recommended dose for benzobicyclon alone in japonica rice fields was 300-487.5 g/hm2, but for benzobicyclon·penoxsulam·bensulfuron-methyl 35% SC, it was 210-315 g/hm2, which was safe for the tested indica and japonica rice. The plant control effect and fresh weight control effect against broad-leaved weeds and other weeds in paddy fields 15 days and 35 days after application were both above 92%, while those against Gramineous weeds were 77.86%-98.52% and 76.85%-94.98%, respectively, but with a yield increase effect on the tested indica and japonica rice varieties to some extent: compared with the negative control, the yield was increased by 5.31%-23.77% and 19.78%-26.88%, respectively. Based on the principles of high efficiency, economy and safety, the recommended dosage for benzobicyclon·penoxsulam·bensulfuron-methyl 35% SC in paddy fields is 210-262.5 g/hm2, and it should be applied during the weed germination period after rice transplantation. |
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