Managing angular leaf spot on common bean in Africa by supplementing farmer mixtures with resistant varieties

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dc.creatorPyndji, MM
dc.creatorTrutmann, P.
dc.date1992
dc.date2014-09-24T08:42:27Z
dc.date2014-09-24T08:42:27Z
dc.date.accessioned2026-06-27T14:33:41Z
dc.descriptionThe effectiveness of supplementing local bean (Phaseolus vulgaris) mixtures with varieties resistant to angular leaf spot, caused by Phaeoisariopsis griseola, was evaluated in the Great Lakes region of Africa. The severity of angular leaf spot was lower (P = 0.05) in farmer mixtures supplemented with 25% or more of resistant lines BAT76 or A285 in three of four seasons than in mixtures without resistant lines. Significant decreases in angular leaf spot severity were also obtained in the new mixtures when measuring both original farmer and new resistant lines. The results suggest that important foliar diseases can be controlled with modern plant breeding products in systems where varietal mixtures predominate through supplementation rather than displacement of existing genetic diversity by new varieties. However, the supplementation strategy is also limited, because its indiscriminate use in managing multiple diseases could lead to severe erosion of local genetic diversity.
dc.identifierhttps://hdl.handle.net/10568/43648
dc.identifier.urihttp://hdl.handle.net/123456789/81756
dc.languageen
dc.publisherScientific Societies
dc.rightsOpen Access
dc.subjectphaseolus vulgaris
dc.subjectdisease control
dc.subjectphaeoisariopsis
dc.subjectplant breeding
dc.subjectvariety trials
dc.subjectcontrol de enfermedades
dc.subjectfitomejoramiento
dc.subjectensayos de variedades
dc.titleManaging angular leaf spot on common bean in Africa by supplementing farmer mixtures with resistant varieties
dc.typeJournal Article

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Centro Internacional de Agricultura Tropical (CIAT)