Effects of Sweet Potato Virus Disease (SPVD) on the Yield of Sweet Potato Genotypes in Cameroon

Autor:	J. C. Bouwkamp, J. M. Ngeve
Rok vydání:	1991
Předmět:	Chlorosis biology Sweet potato mild mottle virus food and beverages Sweet potato feathery mottle virus biology.organism_classification Horticulture Agronomy Plant virus Yield (wine) Genotype Cultivar Convolvulaceae Agronomy and Crop Science
Zdroj:	Experimental Agriculture. 27:221-225
ISSN:	1469-4441 0014-4797
Popis:	SummarySweet potato virus disease (SPVD) causes strap-shaped leaves, vein-clearing, puckering, chlorosis and stunting in susceptible sweet potato varieties and yields are much reduced. To investigate the tolerance of genotypes and obtain a better appraisal of yield loss caused by SPVD, eight sweet potato varieties showing symptoms of SPVD were studied for two years in an area where SPVD is severe. Two varieties, although showing symptoms, were tolerant of the disease; their yields were not significantly depressed by SPVD. Among the remaining six varieties, storage root fresh yields were reduced by 56–90% in plants showing SPVD symptoms. Marketable yields, as well as total and marketable numbers of storage roots were similarly depressed by SPVD in the less tolerant varieties. Significant correlations were found between disease severity rating and yield reduction among cultivars.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::46ecc6f19be1f6be500f618b7bde8fac https://doi.org/10.1017/s0014479700018858 Zobrazit plný text záznamu