A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat
A biotype of the annual grass weed hare barley infesting an alfalfa field with a 24-yr history of the use of the bipyridylium herbicides paraquat and diquat, was investigated for resistance to these herbicides. Rates of up to 800 g ai ha–1 of each herbicide caused no mortality in the hare barley pla...
| Main Authors: | , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Cambridge University Press
1991
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/101698 |
| _version_ | 1855519932234596352 |
|---|---|
| author | Tucker, E.S. Powles, S.B. |
| author_browse | Powles, S.B. Tucker, E.S. |
| author_facet | Tucker, E.S. Powles, S.B. |
| author_sort | Tucker, E.S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | A biotype of the annual grass weed hare barley infesting an alfalfa field with a 24-yr history of the use of the bipyridylium herbicides paraquat and diquat, was investigated for resistance to these herbicides. Rates of up to 800 g ai ha–1 of each herbicide caused no mortality in the hare barley plants from this field. The same species, collected from an adjacent pasture field with no history of bipyridylium herbicide application, exhibited LD50's of 57 and 160 g ai ha–1 for paraquat and diquat, respectively. Tiller numbers and dry matter production in the biotype from the alfalfa field were not affected by the normal rate recommended for both herbicides. These results clearly show that hare barley from the alfalfa field is resistant to paraquat and diquat. Both biotypes were equally sensitive to fluazifop, glyphosate, and sethoxydim. |
| format | Journal Article |
| id | CGSpace101698 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1991 |
| publishDateRange | 1991 |
| publishDateSort | 1991 |
| publisher | Cambridge University Press |
| publisherStr | Cambridge University Press |
| record_format | dspace |
| spelling | CGSpace1016982025-12-08T10:11:39Z A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat Tucker, E.S. Powles, S.B. infestation herbicides mortality tillering production dry matter fluazifop glyphosate sethoxydim A biotype of the annual grass weed hare barley infesting an alfalfa field with a 24-yr history of the use of the bipyridylium herbicides paraquat and diquat, was investigated for resistance to these herbicides. Rates of up to 800 g ai ha–1 of each herbicide caused no mortality in the hare barley plants from this field. The same species, collected from an adjacent pasture field with no history of bipyridylium herbicide application, exhibited LD50's of 57 and 160 g ai ha–1 for paraquat and diquat, respectively. Tiller numbers and dry matter production in the biotype from the alfalfa field were not affected by the normal rate recommended for both herbicides. These results clearly show that hare barley from the alfalfa field is resistant to paraquat and diquat. Both biotypes were equally sensitive to fluazifop, glyphosate, and sethoxydim. 1991-06 2019-06-25T17:08:59Z 2019-06-25T17:08:59Z Journal Article https://hdl.handle.net/10568/101698 en Limited Access Cambridge University Press Tucker, E.S. & Powles, S.B. (1991). A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat. Weed Science, 39(2), 159-162. |
| spellingShingle | infestation herbicides mortality tillering production dry matter fluazifop glyphosate sethoxydim Tucker, E.S. Powles, S.B. A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat |
| title | A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat |
| title_full | A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat |
| title_fullStr | A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat |
| title_full_unstemmed | A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat |
| title_short | A biotype of hare barley (Hordeum leporinum) resistant to paraquat and diquat |
| title_sort | biotype of hare barley hordeum leporinum resistant to paraquat and diquat |
| topic | infestation herbicides mortality tillering production dry matter fluazifop glyphosate sethoxydim |
| url | https://hdl.handle.net/10568/101698 |
| work_keys_str_mv | AT tuckeres abiotypeofharebarleyhordeumleporinumresistanttoparaquatanddiquat AT powlessb abiotypeofharebarleyhordeumleporinumresistanttoparaquatanddiquat AT tuckeres biotypeofharebarleyhordeumleporinumresistanttoparaquatanddiquat AT powlessb biotypeofharebarleyhordeumleporinumresistanttoparaquatanddiquat |