A new herbicide combination for weed management in dry direct-seeding indica rice field

文献类型： 外文期刊

第一作者： Gao, Yuan

作者： Gao, Yuan;Yuan, Guohui;Fang, Jiapeng;Tian, Zhihui;Shen, Guohui;Liu, Yong

作者机构：

关键词： Herbicide efficacy; selectivity; dry direct-seeding indica rice; post-emergence herbicides; weed

期刊名称：CHILEAN JOURNAL OF AGRICULTURAL RESEARCH （ 影响因子：1.5； 五年影响因子：1.8 ）

ISSN： 0718-5839

年卷期： 2024 年 84 卷 4 期

页码：

收录情况： SCI

摘要： Dry direct-seeding can get rid of the constraints of high-water demand, and is the simplest and most laborsaving mode in rice (Oryza sativa L.) cultivation. However, weeds are more prone to occur in dry direct-seeding rice fields, coupled with increased herbicide resistance, leading to confusion among growers regarding herbicide selection. In this study, our investigation results revealed total grass quantity reached 458.82 plants m(-2) . Two round of field experiments were conducted to determine suitable post-emergence herbicides for dry direct-seeding indica rice. The results showed that among the herbicides safe to indica rice, the efficacy of the combination of pyraquinate (a new 4-hydroxyphenylpyruvate dioxygenase inhibitor, 150.0 g ai ha(-1)) + florpyrauxifen-benzyl (13.5 g ai ha(-1)) on Leptochloa chinensis (L.) Nees, Eclipta prostrata (L.) L., Cyperus iria L., Fimbristylis miliacea auct., and total grasses were 89.1%, 97.8%, 97.2%, 90.1%, and 92.8%, respectively; the efficacy of metamifop (120.0 g ai ha(-1)) + florpyrauxifen-benzyl (18.0 g ai ha(-1)) and 22.0% cyhalofop-butyl + pyrazosulfuron-ethyl + bispyribac-sodium OD (148.5 g ai ha(-1)) on main weeds also exceeds 85.0%, except for cyhalofop-butyl-resistant L. chinensis . The combination of metamifop + florpyrauxifen-benzyl and 22.0% cyhalofop-butyl + pyrazosulfuron-ethyl + bispyribac-sodium OD can be selected for fields where L. chinensis is not resistant to acetyl-CoA carboxylase (ACCase) inhibitors. The combination of pyraquinate + florpyrauxifenbenzyl is the most promising combination to control multiple weeds, even ACCase inhibitors-resistant weeds. This study could also provide references for herbicides selection and management of ACCase inhibitors-resistant L. chinensis in dry direct-seeding indica rice field worldwide.

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