Spatial and temporal spread of cassava mosaic virus disease in cassava grown alone and when intercropped with maize and/or cowpea.

Abstract

The spread of cassava mosaic disease (CMD) and populations of the whitefly vector (Bemisia tabaci) were recorded in cassava when grown alone and when intercropped with maize and/or cowpea. The trials were planted under conditions of high inoculum pressure in 1995 and 1996 at a site in the lowland rainforest zone of southern Cameroon. In the 1995 experiment, the maize and cowpea intercrops reduced the final incidence of CMD in the cassava cvs. Dschang White and Dschang Violet, but not in the more resistant cv. Improved. In the 1996 experiment with cv. Dschang Violet, the maize and cowpea intercrops grown alone or together decreased adult whitefly populations on cassava by 50% and CMD incidence by 20%. The monomolecular population growth model generally provided the best fit for disease progress. Areas under the disease progress curves (AUDPCs) and incidences expressed as multiple infection units were significantly (P

Citation

Journal of Phytopathology, (2002) 150 (7) 365-374 [DOI: 10.1046/j.1439-0434.2002.00775.x]

Spatial and temporal spread of cassava mosaic virus disease in cassava grown alone and when intercropped with maize and/or cowpea.

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