Resistance of sweet potato cultivars and wild relatives toward root-knot nematodes

agallas agentes nocivos agronomic characters animal animal nuisible animales animales nocivos animals aschelminthes biological control breeding breeding aims cecidozoa convolvulaceae crops cultivar cultivars cultivos dicotiledoneas dicotyledons economic plants facteur nuisible faune et flore sauvages galle helminthe helminths helmintos hortalizas (plantas) industrial crops injurious factors invertebrados invertebrates ipomoea ipomoea batatas living resources lutte biologique meloidogyne natural resources nematode nematodes nematodos nematodos de las plantas noxious animals objetivo de mejoramiento organisme nuisible pest control methods pest resistance pests plagas plant galls plant nematodes plantas plantas azucareras plantas feculentas plantas industriales plante plante de culture plante industrielle plante racine plants recursos recursos naturales resistance to injurious factors resistencia a las plagas resources ressource ressource naturelle ressource vivante root crops root vegetables starch crops sugar crops symptome symptoms tubiflorae vegetable crops vida silvestre wildlife