Herbicidal Activity of Cinmethylin against Grass Weeds and Its Safety for Use with Different Wheat Varieties

文献类型： 外文期刊

第一作者： Xu, Hongle

作者： Xu, Hongle;Leng, Qiuli;Su, Wangcang;Sun, Lanlan;Cheng, Jingping;Wu, Renhai;Xu, Hongle;Leng, Qiuli;Su, Wangcang;Sun, Lanlan;Cheng, Jingping;Wu, Renhai

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关键词： pre-emergence herbicide; grass weeds; root; control efficacy; phytotoxicity

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2024 年 14 卷 5 期

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收录情况： SCI

摘要： Cinmethylin is a potential pre-emergence herbicide that could be used to control grass weeds in winter cereals. To determine the herbicidal activity of cinmethylin against common gramineous weeds in wheat fields in China and its level of safety on wheat, we conducted the following experiments: (i) assessing the efficacy of cinmethylin against 11 grass weeds and (ii) determining its safety against 19 wheat varieties. The results showed that cinmethylin had good herbicidal efficacy against annual bluegrass (Poa annua L.), shortawn foxtail (Alopecurus aequalis Sobol.), slender meadow foxtail (Alopecurus myosuroides Huds.), Japanese foxtail (Alopecurus japonicus Steud.), Italian ryegrass (Lolium multiflorum Lam.), British timothy (Phleum paniculatum Huds.), Asia Minor bluegrass (Polypogon fugax Nees ex Steud.), Helictotrichon tibeticum (Roshev.) Holub., and wild oat (Avena fatua L.), with a GR50 (the herbicide dose resulting in 50% growth inhibition) value of 4.50-99.21 g a.i. ha-1 in plant height and 1.43-70.34 g a.i. ha-1 in fresh weight. However, cinmethylin cannot control Japanese brome (Bromus japonicus L.) or Tausch's goatgrass (Aegilops tauschii Coss.) at a dose of 200 g a.i. ha-1. Different wheat varieties varied in their phytotoxicity to cinmethylin. Overall, there is a phytotoxicity risk when using cinmethylin on wheat, mainly to wheat roots, with a reduction in root length of 40.81-64.09% at a dose of 400 g a.i. ha-1. These findings indicate that the pre-emergence herbicide cinmethylin provides good efficacy against most grass weeds and may possess potential for weed management in wheat fields. However, attention should be given to the application dosage and the sensitivity of wheat varieties when using cinmethylin in wheat fields.

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