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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 2072-6589
Vol. 12, No. 3, 2004, pp. 197-200
Bioline Code: cs04022
Full paper language: English
Document type: Research Article
Document available free of charge

African Crop Science Journal, Vol. 12, No. 3, 2004, pp. 197-200

 en Evaluation of cassava varieties for yield and adaptability in Zimbabwe
Chitiyo, M. & Kasele, I.

Abstract

Cassava ( Manihot esculenta check for this species in other resources ) is becoming an important household food security crop especially in the drier areas of Zimbabwe. Cassava, however, performs differently under various soil and climatic conditions. To address this problem, eighteen newly introduced cassava varieties namely, M 86/00106, I92/0326, 92B/0006, I92/0057, XM7, I91/02324, TME1, I92/0067, I4(2)1443, I63397, XM6, I92/0342, I4(2)1425, TME2, I30001, 91/0282, I00142, I91/02327; and two local accessions (Rushinga White and Smart farmer) were evaluated under rainfed conditions, without fertilisation during the 2000/2001 and 2002/2003 cropping seasons. From the study, M86/00106, I920326, 92B/006, I920057 and XM7 showed stable yields across the two environments, even though yields were slightly higher in NR 11. Mean yield of the six best performing-improved varieties was 14.4 t ha-1, 26% higher than 10.70 t ha-1, mean of the local accessions. The study also showed that cassava will produce acceptable yields even under sub-optimal conditions. There were no significant disease incidence recorded in both sites and on all varieties.

Keywords
Manihot esculenta; marketable yield; mealybug

 
 fr
Chitiyo, M. & Kasele, I.

Résumé

Le manioc Manihot esculenta check for this species in other resources est devenu une plante importante pour la sécurité alimentaire des ménages, spécialement dans les zones sèches du Zimbabwe. Cependant, la performance du manioc varie avec les conditions climatiques. Pour résourdre ce problème, 18 nouvelles variétés de manioc étaient introduites comprennant M86/00106, I92/0326, 92B/0006, I92/0057, XM7, I91/02324, TME1, I92/0067, I4(2)1443, I63398, XM6, I92/0342, I4(2)1425, TME2, I30001, 91/0282, I00142, I91/02327 et deux variétés locales Rushinda blanc et le smart fermier étaient évaluées dans des conditions pluvieuses, sans engrais pendant les saisons culturales 2000/2001 et 2002/2003. L'étude montra que M86/00106, I920326, 92B/006, I920057 et XM7 avaient des rendements stables à travers les deux environnements, même si les rendements étaient légèrement supérieurs dans NR11. La moyenne de six plus performantes variétés améliorées étaient 14.4 t ha-1, 26% plus élévé que le 10.70 t ha-1 moyenne des variétés locales. L'étude montra aussi que le manioc peut produire des rendements acceptables même sous des conditions sub-optimales. L'incidence de la maladie n'a pas été significative dans les deux sites et pour toutes les variétés.

Mots Clés
Manihot esculenta; rendement vendable; virus farineux

 
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