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) ( Gibson et al., 1998 ), Alternaria bataticola blight, and African sweetpotato weevils, Cylas puncticollis Boheman and Cylas brunneus Fabricius. Farmers are also known to abandon poor-performing traditional cultivars in favor of newly developed ones

good to excellent consumer acceptance, depending on growth conditions. The cultivar has moderate to high field resistance to sweetpotato virus disease (SPVD) and Alternaria bataticola blight. Both diseases can be devastating, causing high storage root

field resistance to sweetpotato virus disease (SPVD) and alternaria bataticola blight. The two cultivars were bred targeting development of vitamin A–rich (biofortified) orange-fleshed sweetpotato (OFSP). OFSP have been shown to be both effective for

field resistance to sweetpotato virus disease (SPVD) and Alternaria bataticola blight and high storage root yields compared with the average national storage root yield of 4.0 t·ha −1 ( International Potato Center, 1999 ). The release of these five

field resistance to sweetpotato virus disease (SPVD) and Alternaria bataticola blight and yield higher (8.3 to 22.8 t·ha −1 ) than the average storage root yield of 6.0 t·ha −1 [ FAOSTAT, 2011 ; International Potato Center (CIP), 1999 ]. Two of the

harvest tuber rot of potato incited by Rhizoctonia bataticola Arch. Phytopathol. Plant Prot. 31 225 231 Aveling, T.A.S. Snyman, H.G. Naude, S.P. 1993 Evaluation of seed treatments for reducing Alternaria