Critical period for weedy rice control in direct-seeded rice
On-station trials were conducted in MARDI Seberang Perai in main season 2004/05 and off-season 2005 to determine the critical period of weedy rice control in direct-seeded rice. This period generally consisted of two discrete periods, a critical weed free period and a critical time of weed removal....
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Malaysian Agricultural Research and Development Institute (MARDI)
2007
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| Online Access: | http://psasir.upm.edu.my/id/eprint/49298/ http://psasir.upm.edu.my/id/eprint/49298/1/49298.pdf |
| _version_ | 1848851232063488000 |
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| author | Man, Azmi Juraimi, Abdul Shukor Mohd Yusof, Mohamad Najib |
| author_facet | Man, Azmi Juraimi, Abdul Shukor Mohd Yusof, Mohamad Najib |
| author_sort | Man, Azmi |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | On-station trials were conducted in MARDI Seberang Perai in main season 2004/05 and off-season 2005 to determine the critical period of weedy rice control in direct-seeded rice. This period generally consisted of two discrete periods, a critical weed free period and a critical time of weed removal. The Gompertz and Logistic equations were fitted to data representing increasing durations of weed control and weed interference, respectively. In the main season 2004/05, only weedy rice was allowed to grow in association with direct-seeded rice. Other weeds were controlled with selective herbicide applications. In the off- season 2005, mixed weeds including weedy rice were let to grow in association with direct-seeded crop. A period of weedy rice control lasting up to 53 DAS prevented a yield loss of more than 5% in main season 2004/05. However, weedy rice competition could cause 5% yield loss if it allowed to compete with direct-seeded crop until 16 DAS. Therefore, the critical period for weedy rice control was from 16 to 53 DAS. In off-season 2005, to prevent a yield loss of more than 5%, a period of weed free lasting 60 DAS is required and weed competition could cause 5% yield loss if it allowed to compete with directseeded crop until 12 DAS. It indicates critical period for weed control under mixed weed infestation from 12 to 60 DAS under 5% yield loss. |
| first_indexed | 2025-11-15T10:18:54Z |
| format | Article |
| id | upm-49298 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:18:54Z |
| publishDate | 2007 |
| publisher | Malaysian Agricultural Research and Development Institute (MARDI) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-492982016-12-30T02:30:34Z http://psasir.upm.edu.my/id/eprint/49298/ Critical period for weedy rice control in direct-seeded rice Man, Azmi Juraimi, Abdul Shukor Mohd Yusof, Mohamad Najib On-station trials were conducted in MARDI Seberang Perai in main season 2004/05 and off-season 2005 to determine the critical period of weedy rice control in direct-seeded rice. This period generally consisted of two discrete periods, a critical weed free period and a critical time of weed removal. The Gompertz and Logistic equations were fitted to data representing increasing durations of weed control and weed interference, respectively. In the main season 2004/05, only weedy rice was allowed to grow in association with direct-seeded rice. Other weeds were controlled with selective herbicide applications. In the off- season 2005, mixed weeds including weedy rice were let to grow in association with direct-seeded crop. A period of weedy rice control lasting up to 53 DAS prevented a yield loss of more than 5% in main season 2004/05. However, weedy rice competition could cause 5% yield loss if it allowed to compete with direct-seeded crop until 16 DAS. Therefore, the critical period for weedy rice control was from 16 to 53 DAS. In off-season 2005, to prevent a yield loss of more than 5%, a period of weed free lasting 60 DAS is required and weed competition could cause 5% yield loss if it allowed to compete with directseeded crop until 12 DAS. It indicates critical period for weed control under mixed weed infestation from 12 to 60 DAS under 5% yield loss. Malaysian Agricultural Research and Development Institute (MARDI) 2007 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/49298/1/49298.pdf Man, Azmi and Juraimi, Abdul Shukor and Mohd Yusof, Mohamad Najib (2007) Critical period for weedy rice control in direct-seeded rice. Journal of Tropical Agriculture and Food Science, 35 (2). pp. 333-339. ISSN 1394-9829; ESSN: 2289-9650 http://ejtafs.mardi.gov.my/index.php/publication/issues/archive/40-2007/volume-35-no2/168-350216 |
| spellingShingle | Man, Azmi Juraimi, Abdul Shukor Mohd Yusof, Mohamad Najib Critical period for weedy rice control in direct-seeded rice |
| title | Critical period for weedy rice control in direct-seeded rice |
| title_full | Critical period for weedy rice control in direct-seeded rice |
| title_fullStr | Critical period for weedy rice control in direct-seeded rice |
| title_full_unstemmed | Critical period for weedy rice control in direct-seeded rice |
| title_short | Critical period for weedy rice control in direct-seeded rice |
| title_sort | critical period for weedy rice control in direct-seeded rice |
| url | http://psasir.upm.edu.my/id/eprint/49298/ http://psasir.upm.edu.my/id/eprint/49298/ http://psasir.upm.edu.my/id/eprint/49298/1/49298.pdf |