Obien, S.R. and Plucknett, D.L. and Pena, R. S. de la and Escalada, R.G. (1975) Chemical weed control in a ratoon cropping system for sorghum. In: Proceedings of 5th Asian-Pacific Weed Science Society Conference, October, 1975, Tokyo, Japan.
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Abstract
Growing sorghum in ratoon systems leads to weed build-up in the succeeding non-cultivated ratoon crops. Standard preemergence herbicides used in single-crop sorghum are not adequate alone in ratoon systems. Paraquat applied over the fresh stubble the first 5 days after stover harvest provided improved weed control and higher stover yields. Paraquat at 0.28 kg/ha was as effective as 0.58 kg/ha which caused some crop injury. Applying paraquat more than 5 days after stover harvest injured or killed young sorghum tillers and led to poor ratoon stands and yields. Coupling of pre-em. and contact herbicides is considered necessary for weed control in non-cultivated ratoon sorghum; the best treatments were propachlor at 4.5 kg or atrazine 2.25 kg/ha pre-em. in the first crop followed by paraquat 0.58 kg/ha in the ratoon crop
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Author Affiliation: | Hawaii Agricultural Experiment Station, University of Hawaii, Honolulu, Hawaii, 96822, USA |
| Subjects: | Plant Protection |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 10 Sep 2012 03:54 |
| Last Modified: | 10 Sep 2012 04:00 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/7775 |
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