Characterization of Ethoxysulfuron Herbicide Selectivity in Common Bean Cultivars

ABSTRACT: In literature, there are few studies evaluating the response of different bean cultivars to herbicides, particularly the ALS enzyme inhibitors. The objective of this study was to evaluate the selectivity of common bean cultivars to the herbicide ethoxysulfuron and to select cultivars that are more tolerant to it. An experiment was conducted in a greenhouse, in a completely randomized experimental design with four replications. Factors consisted in 20 bean cultivars (IPR Eldorado, IPR Siriri, IPR Gralha, IPR 81, IPR Uirapuru, IPR Colibri, IPR Tuiuiú, BRS Esplendor, IPR Tangará, IPR Juriti, IPR Corujinha, IPR Andorinha, IPR Curió, BRS Campeiro, BRS Pérola, BRS Notável, BRS Estilo, UTF 3, UTF 5 e UTF 6), and four doses of ethoxysulfuron (0, 50, 100 and 200 g ha-1) were used. At the dose of 200 g ha-1, the reduction of the shoot dry matter of plants ranged from 30 to 80%, indicating that there was high variability in the response of bean cultivars to the herbicide. The bean cultivars classified as more tolerant to ethoxysulfuron are: IPR 81, IPR Uirapuru, BRS Estilo, IPR Gralha and BRS Pérola, while the less tolerant cultivars are: IPR Eldorado, IPR Tuiuiú, IPR Tangará, IPR Curió, UTF 3, UTF 5 and BRS Esplendor.

摘要：现有文献中，针对不同菜豆品种对除草剂响应的研究较为匮乏，针对乙酰乳酸合酶（ALS enzyme）抑制剂类除草剂的相关研究尤为稀缺。本研究旨在评估普通菜豆品种对乙氧磺隆（ethoxysulfuron）的选择性，并筛选出对该除草剂耐受性更强的品种。本试验于温室中开展，采用完全随机试验设计，设置4次重复。试验设置两个因素：20个菜豆品种（IPR Eldorado、IPR Siriri、IPR Gralha、IPR 81、IPR Uirapuru、IPR Colibri、IPR Tuiuiú、BRS Esplendor、IPR Tangará、IPR Juriti、IPR Corujinha、IPR Andorinha、IPR Curió、BRS Campeiro、BRS Pérola、BRS Notável、BRS Estilo、UTF 3、UTF 5及UTF 6），以及4个乙氧磺隆施用剂量（0、50、100和200 g ha⁻¹）。当施用剂量为200 g ha⁻¹时，植株地上部干物质重量降幅介于30%至80%之间，表明不同菜豆品种对该除草剂的响应存在较高变异性。被归类为对乙氧磺隆耐受性较强的菜豆品种包括：IPR 81、IPR Uirapuru、BRS Estilo、IPR Gralha及BRS Pérola；而耐受性较弱的品种则为：IPR Eldorado、IPR Tuiuiú、IPR Tangará、IPR Curió、UTF 3、UTF 5及BRS Esplendor。