Bock , C. (1995) Studies of The Epidemiology, Variability and Control of Sorghum Downy Mildew [Peronosclerospora Sorghi (Weston & Uppal) C.G. Shawl] on Sorghum and Maize in Africa. PhD thesis, University of Reading .
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Abstract
Sorghum downy mildew [Peronosclerospora sorgki (Weston and Uppal) C.G. Shawl is widespread on sorghum and maize crops in tropical and sub-tropical regions of the world. There is much information available about its epidemiology, variability and control in the USA and Asia, but a scarcity of information on these aspects in Africa. This information is important to the successful management and control of the disease. The potential of P. sorghi to reduce yield has made it a priority to investigate these aspects in Africa.A survey of the geographic distribution of P. sorghi was undertaken in Nigeria and Zimbabwe, and parts of Zambia, Mozambique and Rwanda. In the humid forest of southern Nigeria only maize crops were infected within an epidemic zone of about 5 .Ox104 km2. In an early- and mid-season survey the mean incidence (% plants infected) in diseased maize crops was 18.8 and 30.5 % respectively. In the more arid north of Nigeria, Zimbabwe, Zambia and Rwanda there was a scattered distribution of P. sorghi on both sorghum and maize crops. Infected crops were found from sea level to over 1500 m, commonly occurring in dry, woodland type vegetation.....
| Item Type: | Thesis (PhD) |
|---|---|
| Additional Information: | Several people provided advice, support and encouragement during the period of this project. Without their help, not only would the thesis have taken longer to complete, but some aspects of it may not have been possible. |
| Author Affiliation: | University of Reading |
| Subjects: | Statistics and Experimentation Crop Improvement |
| Divisions: | Maize Sorghum |
| Depositing User: | Mr Arbind Seth |
| Date Deposited: | 28 Jul 2013 10:27 |
| Last Modified: | 28 Jul 2013 10:27 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/11222 |
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