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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 2072-6589
Vol. 3, No. 2, 1995, pp. 203-207
Bioline Code: cs95027
Full paper language: English
Document type: Research Article
Document available free of charge

African Crop Science Journal, Vol. 3, No. 2, 1995, pp. 203-207

 en Sorghum Diseases in Tanzania
Mansuetus, S.B.A.

Abstract

In Tanzania sorghum (Sorghum bicolor L.) is grown in all agro-ecological zones and is a subsistence crop in the semi-arid areas. Twenty two diseases and Striga weed have been identified to be major constraints of sorghum production in the country. Grain mould, gray leafspot, anthracnose, leaf rust, leaf blight and covered kernel smut are the most important and widespread diseases of sorghum, while the incidence of downy mildew, ergot and sooty stripe is increasing. Different sources of resistance to grain mould, leaf blight, anthracnose, downy mildew and Striga have been identified. Effective and durable resistance to grain mould will probably require simultaneous resistance to a series of pathogens because different sibling species or mating populations within Fusarium section Liseola exist on sorghum in Tanzania. The deployment of biotechnologically transformed sorghum could potentially control sorghum diseases such as grain mold.

Keywords
Biosafety, diseases, grain mould, Sorghum bicolor

 
 fr
Mansuetus, S.B.A.

Résumé

En Tanzanie, le sorgho (Sorghum bicolor L.) qui est cultive dans toutes les zones agro-ecologiques, est une culture de subsistance dans les zones semi-arides. Vingt deux maladies et la mauvaise herbe Striga constituent la contrainte majeure a la production du sorgho dans le pays. La moisissure de graines, 'gray leaf spot", l'anthracnose, la rouille, "leaf blight" et "covered kernels smut" sont les maladies plus importantes et les plus repandues tandis que l'incidence du mildiou, de l'ergot et "sooty stripe" progresse. Differentes sources de resistance aux maladies majeures et au Striga ont ete identifiees. Une resistance durable et effective a la moisissure necessitera probablement une resistance simultannee a toute une serie de pathogenes a cause de la difference d'especes et de mode d'accouplement de populations de la fusariose de la section Liseola existant sur le sorgho en Tanzanie. La diffusion de sorgho biotechnologiquement transforme pourrait potentiellement faciliter le controle des maladies du sorgho telle que la moissisure de graines. La Tanzanie a besoin d'etablir un comite de biosecurite et de mettre en place des politiques et procedures reglementant la biotechnologie.

Mots Clés
Biosecurite, maladies, moisissure de graines,Sorghum bicolor

 
© Copyright 1995 - African Crop Science Society

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