Susceptibility of Weed Species of Convolvulaceae to Root-Infecting Pathogens of Sweet Potato

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Abstract
Species of Convolvulaceae that commonly occur as weeds in agricultural land in Louisiana [USA] (Ipomoea alba, I. hederifolia, I. hederacea, I. lacunosa, I. purpurea, I. trichocarpa, I. wrightii and Jacquemontia tamnifolia) were compared with ''Centennial'' sweet potato for raeaction to Streptomyces ipomoea, Ceratocystis fimbriata, Fusarium oxysporum f. sp. batatas, Plenodomus destruens, Monilochaetes infuscans, Rotylenchulus reniformis and Meloidogyne incognita. Several species were as susceptible or more susceptible than ''Centennial'' for each pathogen and no species was immune to any pathogen. Each host species was susceptible to several pathogens but I. alba, I. hederifolia and J. tamnifolia were generally less susceptible to the pathogens than ''Centennial'' or the other species.

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