Kato, D. and Karel, A.K. and Ndunguru, B.J. (1982) Effect of insecticide spray on insect pests and yield of sorghum and simsim in pure stand and in intercropping: summary. In: Intercropping. Proceedings of the Second Symposium on Intercropping in Semi-Arid Areas, 4-7 August, 1980, Morogoro, Tanzania.
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Abstract
In an experiment monoculture and intercropping with three within-row spacings (10, 7.5 and 5 cm) were investigated. Didimac 25 (25% DDT) was applied at 1 kg a.i./600 l/ha six times after planting. It was observed that pest control increased sorghum yield considerably. A yield decrease of sorghum and sesame was recorded at all spacings. The highest sorghum yield in intercropping was obtained at a spacing of 7.5 cm. The overall higher yields of both crops in intercropping may have occurred due to morphological differences. Intraspecific competition may have been greater than interspecific competition. Furthermore, the combined yield advantage in intercropping may be due to less damage by pests, particularly shoot fly, midges and aphids, in intercropped than in monocrop sorghum
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | TROPAG | Cereal crops | sorghum | intercropping | spacing | insect pests | pest control chemical | Tanzania | Sorghum bicolor Sesamum indicum |
| Author Affiliation: | Faculty of Agriculture, Forestry and Veterinary Science, University of Dar es Salaam, Morogoro, Tanzania |
| Subjects: | Plant Production Plant Protection |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 08 Aug 2012 05:16 |
| Last Modified: | 08 Aug 2012 05:18 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/7239 |
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