第 53 卷第 3 期 Vol. 53 No. 3 2023 年 6 月 Jun 2023

所属栏目：农药及中间体 40%砜吡草唑悬浮剂防治大豆田一年生杂草效果与安全性

吴明峰1，2，3，黄至畅1，2，3，孔玄庆1，2，3，龙楚云1，2，3，成淑芬1，2，3，余倩莎1，2，3，李建明1，2，3，陈力华1，2，3*，欧晓明1，2，3* （1. 湖南化工研究院有限公司 国家农药创制工程技术研究中心，湖南 长沙 410014；2. 农用化学品湖南省重点实验室，湖南 长沙 410014；3. 湖南化研院检测技术有限公司，湖南 长沙 410014）

摘　要：为明确40%砜吡草唑悬浮剂土壤喷雾处理对大豆田一年生杂草的防效及对大豆的安全性，2021年采用随机区组设计进行田间药效试验。结果表明：40%砜吡草唑悬浮剂在150、180、210、360 g a.i./hm2剂量下对大豆田主要杂草马唐、狗尾草、藜、反枝苋、稗草、青葙、苘麻、马齿苋等均有较好防治效果。药后40 d总草株防效88.14%~97.58%，总草鲜重防效86.44%~97.73%，增产率3.52%~12.68%，且对供试大豆品种安全。40%砜吡草唑悬浮剂可作为大豆田备选除草剂，采用土壤喷雾法防治大豆田一年生杂草，推荐使用剂量150~180 g a.i./hm2。

关键词：40%砜吡草唑悬浮剂；大豆；杂草；防效；安全性

中图分类号：S482.4　　文献标识码：A　　文章编号：1009-9212（2023）03-0016-04

Control Efficacy of Pyroxasulfone 40% SC Against Annual Weeds and Its Safety in Soybean Fields

WU Ming-feng1,2,3, HUANG Zhi-chang1,2,3, KONG Xuan-qing1,2,3, LONG Chu-yun1,2,3, CHENG Shu-fen1,2,3, YU Qian-sha1,2,3, LI Jian-ming1,2,3, CHEN Li-hua1,2,3*, OU Xiao-ming1,2,3* (1. National Engineering Research Center for Agrochemicals, Hunan Research Institute of Chemical Industry Co., Ltd., Changsha 410014, China; 2. Agrochemical Key Laboratory of Hunan Province, Changsha 410014, China; 3. Hunan Research Institute of Chemical Industry Testing Technology Co., Ltd., Changsha 410014, China)

Abstract：The study was conducted to determine the control efficacy of Pyroxasulfone 40% SC against annual weeds in soybean fields and its safety on soybean by soil spray treatment, a randomized block design was used to conduct field efficacy trials in 2021. The results showed that Pyroxasulfone 40% SC had excellent control efficacy on the main weeds in soybean fields, such as Digitaria sanguinalis, Setaria viridis, Chenopodium album, Amaranthus retroflexus, Echinochloa crusgalli, Celosia argentea, Abutilon theophrasti and Portulaca oleracea at the effective ingredient dosage of 150, 180, 210 and 360 g a.i./hm2. At 40 days of treatment, the average weed plant control effects of different doses were 88.14%~97.58%, the average fresh weight control effects were 86.44%~97.73%. The yield increase rate of soybean was 3.52%~12.68%, and it was safe for the tested soybean varieties. Therefore, Pyroxasulfone 40% SC could be used as an alternative herbicide to control annual weeds in soybean fields by soil spray, and the recommended dosage was 150~180 g a.i./hm2.

Key words：Pyroxasulfone 40% SC; soybean; weed; control efficacy; safety

基金项目：湖南省企业科技创新创业团队项目（湖南海利新材料科技创新创业团队）。

作者简介：吴明峰（1989—），男，湖南怀化人，助理研究员，硕士，研究方向：农药生物活性（E-mail：348263928@qq.com）。

联 系 人：陈力华，高级工程师，硕士，研究方向：农药残留、化学品安全评估（E-mail：956735378@qq.com）；欧晓明，研究员，博士，研究方向：农药残留化学、环境毒理学（E-mail：xmouhn@163.com）。

收稿日期：2023-05-05