Characterisation of iodo- plus mesosulfuron resistance in an Alopecurus myosuroides Huds. Population from the Czech Republic
| Autor: | Kateřina Hamouzová, Jakub Mikulka, Jaromír Šuk, Madhab Kumar Sen, Pavlína Košnarová, Soham Bhattacharya, Josef Soukup |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Plant, Soil and Environment, Vol 69, Iss 12, Pp 608-614 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1214-1178 1805-9368 |
| DOI: | 10.17221/377/2023-PSE |
| Popis: | The intensification of Alopecurus myosuroides Huds. (black-grass) is becoming a major problem due to its growing resistance to a broad spectrum of acetolactate synthase (ALS)-inhibiting herbicides. Hence, the present study was conducted to evaluate the resistance level of a black-grass population to iodosulfuron plus mesosulfuron and to identify the underlying resistance mechanism. Dose-response studies revealed that the resistance population is 22 times less sensitive to iodosulfuron plus mesosulfuron than the susceptible population. The probable resistance mechanism identified was the target-site substitution of proline (Pro) by threonine (Thr) at the 197th position of the ALS enzyme. Furthermore, whole plant response bioassay experiments demonstrated that this population is also resistant to pinoxaden, chlorotoluron, diflufenican plus pendimethalin plus chlorotoluron, fenoxaprop and flufenacet plus diflufenican. In summary, the current findings recommend using alternative herbicides in integrated weed management to interrupt the possible evolution of herbicide resistance in these species. |
| Databáze: | Directory of Open Access Journals |
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