Preplant Herbicide Programs for the Control of Multiple-Herbicide-Resistant Waterhemp in No-Till Corn

IF 17.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-03-15 DOI:10.5539/jas.v16n4p1

N. Soltani, C. Willemse, P. Sikkema

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Abstract

Multiple-herbicide-resistant (MHR) waterhemp has been confirmed in 18 Ontario counties. A total of four experiments were conducted in commercial fields with MHR waterhemp in 2020 and 2021 to evaluate preplant (PP) herbicide tank mixtures for control of MHR waterhemp in no-till corn. There was minimal visible corn injury from the herbicide treatments evaluated. At 2 WAA, all herbicide tank mixtures provided greater than 90% control of MHR waterhemp except for pyroxasulfone/carfentrazone + atrazine which controlled MHR waterhemp 85%. At 12 WAA, S-metolachlor/mesotrione/atrazine, S-metolachlor/mesotrione/bicyclopyrone/atrazine, and diflufenican + atrazine + flufenacet controlled MHR waterhemp 86, 91, and 98%, respectively; all other herbicide tank mixtures provided 65 to 83% control. At 8 WAA, S-metolachlor/mesotrione/bicyclopyrone/atrazine and diflufenican + atrazine + flufenacet reduced MHR waterhemp density 97 and 100%, respectively similar to the weed-free control; all other herbicide tank mixtures reduced MHR waterhemp density 64 to 96%. At 8 WAA, S-saflufenacil/dimethenamid-P + mesotrione, S-metolachlor/mesotrione/atrazine, tembotrione + dicamba + flufenacet, metolachlor/mesotrione/bicyclopyrone/atrazine, and diflufenican + atrazine + flufenacet reduced MHR waterhemp biomass 96, 97, 98, 98, and 100%, respectively; all other herbicide tank mixtures reduced MHR waterhemp biomass 72 to 93%. MHR waterhemp interference reduced corn yield 80% in this study. All herbicide tank mixtures resulted in corn yield that was similar to the weed-free control. Among the herbicide tank mixtures evaluated S-metolachlor/mesotrione/bicyclopyrone/atrazine and diflufenican + atrazine + flufenacet provided the greatest control of MHR waterhemp in no-till corn.

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控制免耕玉米中抗多种除草剂水麻的播种前除草剂方案

安大略省 18 个县已确认出现了抗多种除草剂（MHR）的水麻。2020 年和 2021 年，在种植了 MHR 水麻的商业田块共进行了四次试验，以评估种植前（PP）除草剂罐装混合物对免耕玉米中 MHR 水麻的控制效果。所评估的除草剂处理对玉米的伤害极小。在 2 WAA 期，除吡唑醚菌酯/氟唑草酮 + 阿特拉津对 MHR waterhemp 的控制率为 85% 外，其他除草剂罐装混合物对 MHR waterhemp 的控制率均超过 90%。在 12 WAA 条件下，S-甲草胺/甲草胺/莠去津、S-甲草胺/甲草胺/双环嘧啶/莠去津、双氟磺草胺+莠去津+氟草胺对 MHR waterhemp 的控制率分别为 86%、91% 和 98%；所有其他混合除草剂的控制率为 65% 至 83%。在 8 WAA 期，S-甲草胺/甲草胺/双环吡喃酮/atrazine 和 diflufenican + atrazine + flufenacet 可分别降低 MHR waterhemp 密度 97% 和 100%，与无杂草对照相似；所有其他除草剂罐混合物可降低 MHR waterhemp 密度 64% 至 96%。在 8 WAA 条件下，S-氟虫腈/二甲吩草胺-P + 甲草胺、S-甲草胺/甲草胺/莠去津、丁草胺 + 麦草畏 + 氟草胺、甲草胺/甲草胺/双环嘧啶酮/莠去津、除草醚 + 阿特拉津 + 氟草胺可分别减少 96、97、98、98 和 100% 的 MHR 水hemp 生物量；所有其他除草剂罐混合物可减少 72% 至 93% 的 MHR 水hemp 生物量。在这项研究中，干扰 MHR 水草会使玉米减产 80%。所有除草剂罐混合物的玉米产量都与无杂草对照相似。在所评估的除草剂罐混合物中，S-甲草胺/甲草胺/双环吡喃酮/莠去津和除虫脲+莠去津+氟草胺对免耕玉米中的 MHR waterhemp 的控制效果最好。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.