Fusarium wilt race 1 on the Silk ‘Sotoumon’ banana cultivar in Benin: distribution, impact on small farmers and agroecological management approaches

A.G. Dassou, S. Tovignan, E. Sossa, S. Déguénon, G.T. Vodouhè, R. Tokannou, G.C. Assogba, C. Akpodji, M.Z. Tachin, A.H. Bokonon-Ganta, S.D. Vodouhè
The AAB banana, from the important group of “Silk” (“Figue pomme” in French), locally called ‘Sotoumon’, is highly valued and demanded, and is very susceptible to Fusarium oxysporum f. sp. cubense race 1 in Benin. This banana cultivar is severely attacked by this fungus. This study determined the distribution, symptom characteristics and yield losses due to Fusarium oxysporum f. sp. cubense race 1 and its impact on the small-scale farmer’s income. The study also explored the impact of farmer management practices and environmental factors on this disease. A total of 50.8% of the observed plants showed yellowing and wilting of the leaves, generally evolving from the oldest leaves to the youngest. The withered leaves broke off at the petiole and hung over the pseudostem. The incidence of the disease varied from 19.3 to 50.8% across the study area (P<0.00001). Agricultural practices such as chemical use, crop and tree associations, and tree shading had a negative association with the incidence of Fusarium wilt race 1. In case of Fusarium wilt infection, the yields were low and varied from 0 to 12 kg (2.1±0.3 kg) with a loss of an average yield of 8.7±0.3 kg. Regarding the disease management strategies, some farmers reinforced the fertility of their soils with decomposed wastes or poultry/animal manure (1.7%), chemical fertilizers (2.5%) and wood ashes (1.7%). Extensive screening is needed to understand the role of organic fertilization in the tolerance of Silk bananas to Fusarium oxysporum f. sp. cubense race 1.
Dassou, A.G., Tovignan, S., Sossa, E., Déguénon, S., Vodouhè, G.T., Tokannou, R., Assogba, G.C., Akpodji, C., Tachin, M.Z., Bokonon-Ganta, A.H. and Vodouhè, S.D. (2023). Fusarium wilt race 1 on the Silk ‘Sotoumon’ banana cultivar in Benin: distribution, impact on small farmers and agroecological management approaches. Acta Hortic. 1367, 191-200
DOI: 10.17660/ActaHortic.2023.1367.22
https://doi.org/10.17660/ActaHortic.2023.1367.22
bananas, Fusarium oxysporum f. sp. cubense race 1, organic fertilization, ‘Sotoumon’, tolerance, Benin
English

Acta Horticulturae