Amoako-Atta, B. and Omolo, E.O. (1983) Yield losses caused by the stem-/pod-borer complex within maize-cowpea-sorghum intercropping systems in Kenya. Insect Science and its Application, 4 (1-2). pp. 39-46.
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Abstract
The effects of 3 trophic levels of insect pests on various intercropping systems of maize, cowpea [Vigna unguiculata] and sorghum were investigated in Kenya in 1981-82. The trophic levels were specialist feeders subsisting only on 1 crop within the intercropping systems (such as Maruca testulalis (Geyer) on cowpea and Atherigona soccata Rond. on sorghum), relatively specialist feeders on 2 of the 3 crops (such as Busseola fusca (Fuller), Chilo partellus (Swinh.), Sesamia calamistis Hmps. and Eldana saccharina Wlk. on maize and sorghum) and generalist feeders (such as Heliothis armigera (Hb.) on all 3 crops). On the basis of yields per unit area of crop, the best cropping patterns were maize with cowpea and sorghum at a land equivalent ratio (LER) of 1.45, and sorghum with cowpea at 1.3 LER. High losses in combinations of maize with sorghum at 0.89 LER suggested that stem-borer colonisation at an early stage of crop establishment, resulting in dead-hearts and reductions in plant populations per unit area, contributed to the overall reduction in crop turnover wthin such mixtures
| Item Type: | Article |
|---|---|
| Author Affiliation: | International Centre of Insect Physiology & Ecology, PO Box 30772, Nairobi, Kenya |
| Subjects: | Plant Protection Crop Improvement |
| Divisions: | Sorghum Maize |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 06 May 2012 13:46 |
| Last Modified: | 06 May 2012 13:47 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/5041 |
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