Threelobe morningglory (Ipomoea triloba) germination and response to herbicides
Experiments were conducted in the laboratory and screenhouse to determine the effects of scarification; alternating day/night temperatures; light, salt, and water stress; seed burial depth; and rice residue on seed germination and seedling emergence of threelobe morningglory, and to evaluate the res...
| Autores principales: | , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Cambridge University Press
2012
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/165131 |
| _version_ | 1855521459274776576 |
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| author | Chauhan, Bhagirath Singh Abugho, Seth Bernard |
| author_browse | Abugho, Seth Bernard Chauhan, Bhagirath Singh |
| author_facet | Chauhan, Bhagirath Singh Abugho, Seth Bernard |
| author_sort | Chauhan, Bhagirath Singh |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Experiments were conducted in the laboratory and screenhouse to determine the effects of scarification; alternating day/night temperatures; light, salt, and water stress; seed burial depth; and rice residue on seed germination and seedling emergence of threelobe morningglory, and to evaluate the response of this weed to commonly available POST herbicides in the Philippines. Germination was stimulated by seed scarification, suggesting that inhibition of germination in this species is mainly due to the hard seed coat. Germination of the scarified seeds was not influenced by the tested temperatures (alternating day/night temperatures of 25/15, 30/20, and 35/25 C) and light. The concentrations of sodium chloride, ranging from 0 to 250 mM, did not influence germination of the scarified seeds of threelobe morningglory. The osmotic potential required for 50% inhibition of maximum germination was −0.35 MPa, although some seeds germinated at −0.6 MPa. Seedling emergence was greatest for the seeds placed on the soil surface (96%), and emergence declined with increased burial depth in soil. The burial depth required for 50% inhibition of maximum emergence was 2.8 cm. No seedlings emerged from a burial depth of 6 cm or greater. Residues of up to 6 Mg ha−1on the soil surface did not influence seedling emergence of threelobe morningglory. The herbicide 2,4-D at 400 g ai ha−1provided excellent control of threelobe morningglory when applied at the four-leaf (100%) and six-leaf (97%) stages. However, at the eight-leaf stage, percent control was reduced to 67% and herbicide rate had to be increased twofold to achieve 95% control. The information gained from this study could contribute to developing components of integrated weed management strategies for threelobe morningglory. Soil inversion by tillage to bury weed seeds below their maximum depth of emergence and early application of an effective POST herbicide could serve as important tools for managing threelobe morningglory. |
| format | Journal Article |
| id | CGSpace165131 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Cambridge University Press |
| publisherStr | Cambridge University Press |
| record_format | dspace |
| spelling | CGSpace1651312024-12-19T14:12:18Z Threelobe morningglory (Ipomoea triloba) germination and response to herbicides Chauhan, Bhagirath Singh Abugho, Seth Bernard 2,4-d drought stress germination herbicides inhibition osmosis pesticides residues scarification seed germination seedlings seeds sodium chloride stress temperature tillage weed control weeds wild relatives Experiments were conducted in the laboratory and screenhouse to determine the effects of scarification; alternating day/night temperatures; light, salt, and water stress; seed burial depth; and rice residue on seed germination and seedling emergence of threelobe morningglory, and to evaluate the response of this weed to commonly available POST herbicides in the Philippines. Germination was stimulated by seed scarification, suggesting that inhibition of germination in this species is mainly due to the hard seed coat. Germination of the scarified seeds was not influenced by the tested temperatures (alternating day/night temperatures of 25/15, 30/20, and 35/25 C) and light. The concentrations of sodium chloride, ranging from 0 to 250 mM, did not influence germination of the scarified seeds of threelobe morningglory. The osmotic potential required for 50% inhibition of maximum germination was −0.35 MPa, although some seeds germinated at −0.6 MPa. Seedling emergence was greatest for the seeds placed on the soil surface (96%), and emergence declined with increased burial depth in soil. The burial depth required for 50% inhibition of maximum emergence was 2.8 cm. No seedlings emerged from a burial depth of 6 cm or greater. Residues of up to 6 Mg ha−1on the soil surface did not influence seedling emergence of threelobe morningglory. The herbicide 2,4-D at 400 g ai ha−1provided excellent control of threelobe morningglory when applied at the four-leaf (100%) and six-leaf (97%) stages. However, at the eight-leaf stage, percent control was reduced to 67% and herbicide rate had to be increased twofold to achieve 95% control. The information gained from this study could contribute to developing components of integrated weed management strategies for threelobe morningglory. Soil inversion by tillage to bury weed seeds below their maximum depth of emergence and early application of an effective POST herbicide could serve as important tools for managing threelobe morningglory. 2012-06 2024-12-19T12:54:44Z 2024-12-19T12:54:44Z Journal Article https://hdl.handle.net/10568/165131 en Cambridge University Press Chauhan, Bhagirath Singh; Abugho, Seth Bernard. 2012. Threelobe morningglory (Ipomoea triloba) germination and response to herbicides. Weed sci., Volume 60 no. 2 p. 199-204 |
| spellingShingle | 2,4-d drought stress germination herbicides inhibition osmosis pesticides residues scarification seed germination seedlings seeds sodium chloride stress temperature tillage weed control weeds wild relatives Chauhan, Bhagirath Singh Abugho, Seth Bernard Threelobe morningglory (Ipomoea triloba) germination and response to herbicides |
| title | Threelobe morningglory (Ipomoea triloba) germination and response to herbicides |
| title_full | Threelobe morningglory (Ipomoea triloba) germination and response to herbicides |
| title_fullStr | Threelobe morningglory (Ipomoea triloba) germination and response to herbicides |
| title_full_unstemmed | Threelobe morningglory (Ipomoea triloba) germination and response to herbicides |
| title_short | Threelobe morningglory (Ipomoea triloba) germination and response to herbicides |
| title_sort | threelobe morningglory ipomoea triloba germination and response to herbicides |
| topic | 2,4-d drought stress germination herbicides inhibition osmosis pesticides residues scarification seed germination seedlings seeds sodium chloride stress temperature tillage weed control weeds wild relatives |
| url | https://hdl.handle.net/10568/165131 |
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