Une maladie du taro, au Nigeria, causee par le Corticium rolfsii.
1981
Arene O.B. | Okpala E.U.
In the rain-forest zone of Nigeria, Corticium rolfsii desease of cocoyam is widespread and has been well known since 1954. The field symptom is sudden collapse of the outer petiole from the base due to the maceration of the tissues by the pathogen. Infected corm exhibits cheesy rot and the periderm is encrusted with the fungal mycelial mat. Yield losses could be up to 90%. Soil inoculum is reduced by grass mulch and monocrops of maize. Farmers may reduce disease by hilling but enhance it by narrow spacing. Planting deep reduces field rot and increases corm yield. Increased disease severity in the field increases storage rot and reduces sprouting. Storage of Xanthosoma sagittifolium on uncovered raised rafters and Colocasia esculenta in soil pits or baskets ashed and covered with fresh pieces of plantain trunk reduces corm rot. Varietal differences exist for resistance and yield.
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