Monitoring of Wild Oat Resistance to ACCase-Inhibiting Herbicides in Wheat Fields Across Iran | ||
| دانش علفهای هرز ایران | ||
| Volume 20, Issue 2, June 2025, Pages 85-104 PDF (2.78 M) | ||
| Document Type: Research Article | ||
| DOI: 10.22034/ijws.2024.134782 | ||
| Authors | ||
| Eskandar Zand* 1; Hamidreza Sasanfar2; Mohammad Hosein Zamani3; ali joumi4; Eshagh Keshtkar* | ||
| 1Iranian Research Institute of Plant Protection | ||
| 2Assistant Professor, Iranian Research Iinstitute of Plant Protection | ||
| 3Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran | ||
| 4Departemant of Agronomy, Faculty of Agriculture,Tarbiat Modares University,Tehran,Iran. | ||
| Abstract | ||
| This study was conducted between 2018 and 2021 in two main parts, including screening experiments aimed at monitoring the resistance status of wild oats (Avena spp.) to commonly used ACCase-inhibiting herbicides, and mapping the distribution of wild oat populations resistant to this group of herbicides in wheat fields across the country. In the whole-plant bioassay experiment, 224 wild oat populations collected from nine provinces were exposed to the recommended application rates (1 and 1.2 L ha-1) of clodinafop-propargyl (Topik® 8% EC) and pinoxaden (Axial® 5% EC). The results showed that among the wild oat populations collected from the studied provinces, Ardabil and Golestan had the highest resistance cases (100%), followed by Fars (97%), Khuzestan (91%), Kermanshah (68%), Tehran and Ilam (64%), and Alborz (33%). In contrast, no clodinafop-propargyl resistance was confirmed in wild oat populations collected from Isfahan province. Overall, 181 (81%) of the 224 tested populations exhibited resistance to clodinafop-propargyl. However, none of the populations in the studied provinces showed resistance to pinoxaden, although the development of resistance was observed in one population from Khuzestan. A distribution map of wild oat populations resistant to clodinafop-propargyl in various provinces was also created. Based on the results of this study, it can be concluded that the continuous and improper use of clodinafop-propargyl herbicide in recent decades has led to the spread of resistance to this herbicide in wild oat populations in wheat fields across various provinces of the country. | ||
| Keywords | ||
| ACCase inhibitor; distribution map; grass weeds; herbicide resistance | ||
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