Identification of major diseases of the common bean (Phaseolus vulgaris L.) in Cameroon and evaluation of their possible reestablishment in the Centre province of Cameroon

Fotio Daniel, Nguefack Julienne, Zonkeng Guepi C., David Olivier, Nounamo Laurent, Mahbou Somo Toukam Gabriel, Bordat Dominique, Tagne Appolinaire, Amvam Zollo Paul Henri. 2005. Identification of major diseases of the common bean (Phaseolus vulgaris L.) in Cameroon and evaluation of their possible reestablishment in the Centre province of Cameroon. In : La recherche agricole au service des acteurs du monde rural : recueil des résumés de la revue scientifiques 2005 de l'IRAD. IRAD. Garoua : IRAD, Résumé, p. 25. Journées scientifiques de la recherche agricole, Yaoundé, Cameroun, 25 July 2005/28 July 2005.

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Abstract : Bean is a high source of vegetal protein in Africa. However its culture suffers many constraints among which seed-borne diseases are of great importance. The purpose of this study was to collect common beans (Phaseolus vulgaris L.) and to survey the disease agents responsible for the low production of this crop in Cameroon, especially in the Centre Province of this country. Twenty five (25) varieties of common bean seeds were collected from different agroecological zones of Cameroon, and cultivated in a sole crop system at Minkoameyos (Yaounde, Cameroon) between the 07th of October 2003 and the 25th of January 2004. The experimental site was characterised by three soil indicators: low pH (5.53), low C/P ratio (81.95) and normal C/N ratio (22.40). The experimental unit consisted of area of 8 m2 (4 m x 2 m). The experimental design was a randomized complete block design with 3 replications. The record of disease symptoms started four weeks after planting using the Compendium of Bean Diseases. The Liquid Assay method allowed the identification of Xanthomonas axonopodis pv. phaseoli and its variant fuscans, Pseudomonas syringae pv. phaseolicola and Pseudomonas syringae pv. syringae as major agents responsible for the common and fuscous bacterial blights, halo blight and brown spot respectively, on infected leaves and seeds. In addition, symptoms of the following diseases were observed in the field: ascochyta blight (Phoma exigua var. diversispora), anthracnose (Colletotrichum lindemuthianum), angular leaf spot (Phaeoisariopsis griseola), floury leaf spot (Mycovellosiella phaseoli), bean common mosaic and black root (Bean common mosaic virus), and of insect pest "le cigare" (Apoderus humeralis). The yield average ranged from 0.046 t/ha to 0.821 t/ha. This low yield was correlated with disease damages observed in the field. (Texte intégral)

Mots-clés Agrovoc : Phaseolus vulgaris, Ravageur des plantes, Identification, Xanthomonas, Pseudomonas syringae

Mots-clés géographiques Agrovoc : Cameroun

Classification Agris : H20 - Plant diseases

Auteurs et affiliations

  • Fotio Daniel, IRAD (CMR)
  • Nguefack Julienne, Université de Yaoundé 1 (CMR)
  • Zonkeng Guepi C., IRAD (CMR)
  • David Olivier, IRAD (CMR)
  • Nounamo Laurent, IRAD (CMR)
  • Mahbou Somo Toukam Gabriel, IRAD (CMR)
  • Bordat Dominique, CIRAD-FLHOR-UPR Horticulture (FRA)
  • Tagne Appolinaire, IRAD (CMR)
  • Amvam Zollo Paul Henri, Université de Ngaoundéré (CMR)

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