نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی، دانشگاه کردستان، سنندج، ایران.
2 گروه مهندسی تولید و ژنتیک گیاهی، دانشکده کشاورزی و منابع طبیعی، دانشگاه رازی، کرمانشاه، ایران.
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
The emergence of herbicide resistance in weeds is one of the factors threatening food security and is currently one of the biggest threats to cereal production in Iran and many other regions of the world. To this end, a study was conducted in 2022 at the University of Kurdistan to investigate the resistance of this weed to common herbicides on 38 populations of suspected-resistant Galium aparine collected from irrigated wheat fields in western Iran, including Kamyaran, Dehgolan, Saqqez, Sanandaj, Ilam, and Kermanshah. After breaking seed dormancy, the reaction of the seeds to the recommended doses of the herbicides 2,4-D and tribenuron-methyl (Granstar) was examined. Then, in two experiments: a) dose-response under the influence of eight doses of the herbicides 2,4-D and tribenuron-methyl, and b) cross-resistance using eight registered herbicides for wheat fields, the studies were conducted. The initial screening results showed that none of the collected populations resisted tribenuron-methyl. Four populations of G. aparine collected from fields in different counties were resistant to the herbicide 2,4-D. The results from examining the effect of other herbicides used in wheat on the 2,4-D-resistant populations showed that they were significantly more sensitive to the two herbicides mesosulfuron+iodosulfuron and metsulfuron+sulfosulfuron, indicating the presence of negative cross-resistance in these populations. One of the reasons for the presence of negative cross-resistance in the 2,4-D-resistant populations is their significantly lower fitness compared to the sensitive populations. This particular characteristic can be used to manage 2,4-D-resistant weeds by alternating the use of the two herbicides mesosulfuron+iodosulfuron and metsulfuron+sulfosulfuron.
کلیدواژه‌ها [English]
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