The occurrence of herbicide-resistant Avena fatua (wild oats) populations to ACCase-inhibiting herbicides in Ireland
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 pino...
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| Format: | Article |
| Language: | English |
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Compuscript Ltd
2021-06-01
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| Series: | Irish Journal of Agricultural and Food Research |
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| Online Access: | https://www.scienceopen.com/hosted-document?doi=10.15212/ijafr-2020-0127 |
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| author | R. Byrne A.V. Vijaya Bhaskar J. Spink R. Freckleton P. Neve S. Barth |
| author_facet | R. Byrne A.V. Vijaya Bhaskar J. Spink R. Freckleton P. Neve S. Barth |
| author_sort | R. Byrne |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-09T19:14:34Z |
| format | Article |
| id | doaj.art-605c62d7cf3d47029263eed867deda50 |
| institution | Directory Open Access Journal |
| issn | 2009-9029 |
| language | English |
| last_indexed | 2024-04-09T19:14:34Z |
| publishDate | 2021-06-01 |
| publisher | Compuscript Ltd |
| record_format | Article |
| series | Irish Journal of Agricultural and Food Research |
| spelling | doaj.art-605c62d7cf3d47029263eed867deda502023-04-06T06:27:07ZengCompuscript LtdIrish Journal of Agricultural and Food Research2009-90292021-06-01601596410.15212/ijafr-2020-0127The occurrence of herbicide-resistant Avena fatua (wild oats) populations to ACCase-inhibiting herbicides in IrelandR. Byrne0A.V. Vijaya Bhaskar1J. Spink2R. Freckleton3P. Neve4S. Barth5Teagasc, Crops Research Centre, Oak Park, Carlow R93 XE12, IrelandTeagasc, Crops Research Centre, Oak Park, Carlow R93 XE12, IrelandTeagasc, Crops Research Centre, Oak Park, Carlow R93 XE12, IrelandDepartment of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UKRothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UKTeagasc, Crops Research Centre, Oak Park, Carlow R93 XE12, IrelandFollowing 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.https://www.scienceopen.com/hosted-document?doi=10.15212/ijafr-2020-0127accase inhibitorsavena fatuacross-resistanceherbicide resistanceintegrated weed management |
| spellingShingle | R. Byrne A.V. Vijaya Bhaskar J. Spink R. Freckleton P. Neve S. Barth The occurrence of herbicide-resistant Avena fatua (wild oats) populations to ACCase-inhibiting herbicides in Ireland Irish Journal of Agricultural and Food Research accase inhibitors avena fatua cross-resistance herbicide resistance integrated weed management |
| title | The occurrence of herbicide-resistant Avena fatua (wild oats) populations to ACCase-inhibiting herbicides in Ireland |
| title_full | The occurrence of herbicide-resistant Avena fatua (wild oats) populations to ACCase-inhibiting herbicides in Ireland |
| title_fullStr | The occurrence of herbicide-resistant Avena fatua (wild oats) populations to ACCase-inhibiting herbicides in Ireland |
| title_full_unstemmed | The occurrence of herbicide-resistant Avena fatua (wild oats) populations to ACCase-inhibiting herbicides in Ireland |
| title_short | The occurrence of herbicide-resistant Avena fatua (wild oats) populations to ACCase-inhibiting herbicides in Ireland |
| title_sort | occurrence of herbicide resistant avena fatua wild oats populations to accase inhibiting herbicides in ireland |
| topic | accase inhibitors avena fatua cross-resistance herbicide resistance integrated weed management |
| url | https://www.scienceopen.com/hosted-document?doi=10.15212/ijafr-2020-0127 |
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