| Title: |
The occurrence of herbicide-resistant Avena fatua (wild oats) populations to ACCase-inhibiting herbicides in Ireland |
| Authors: |
Byrne, R.; Vijaya Bhaskar, A.V.; Spink, J.; Freckleton, R.; Neve, P.; Barth, Susanne |
| Source: |
Irish Journal of Agricultural and Food Research |
| Publisher Information: |
Teagasc |
| Publication Year: |
2021 |
| Collection: |
Teagasc (The Irish Agriculture and Food Development Authority): T-Stór |
| Subject Terms: |
ACCase inhibitors; Avena fatua; cross-resistance; Herbicide resistance; Integrated weed management |
| Description: |
peer-reviewed ; Following growers’ reports of herbicide control problems, populations of 30 wild oats, Avena fatua, were collected from the south-east main arable counties of Ireland in 2016 and investigated for the occurrence and potential for herbicide resistance to acetyl-CoA carboxylase (ACCase) inhibitors pinoxaden, propaquizafop and cycloxydim, as well as acetolactate synthase (ALS) inhibitor mesosulfuron + iodosulfuron. Plant survival ≥20% was considered as the discriminating threshold between resistant and susceptible populations, when plants were treated with full recommended field rates of ACCase/ALS inhibitors. Glasshouse sensitivity screens revealed 2 out of 30 populations were cross-resistant to all three ACCase inhibitors. While three populations were cross-resistant to both pinoxaden and propaquizafop, and additionally, two populations were resistant to propaquizafop only. Different degree of resistance and cross-resistance between resistant populations suggest the involvement of either different point mutations or more than one resistance mechanism. Nevertheless, all populations including the seven ACCase-resistant populations were equally susceptible to ALS inhibitor. An integrated weed management (cultural/non-chemical control tactics and judicious use of herbicides) approach is strongly recommended to minimize the risk of herbicide resistance evolution. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
Irish Journal of Agricultural and Food Research; http://hdl.handle.net/11019/2765 |
| DOI: |
10.15212/ijafr-2020-0127 |
| Availability: |
http://hdl.handle.net/11019/2765; https://doi.org/10.15212/ijafr-2020-0127 |
| Rights: |
Attribution-NonCommercial-ShareAlike 4.0 International ; http://creativecommons.org/licenses/by-nc-sa/4.0/ |
| Accession Number: |
edsbas.FEF209BD |
| Database: |
BASE |