Yield loss attributable to Alternaria blight of sunflower (Helianthus annuus L.) in India and some potentially effective control measures

allium allium sativum alternaria alternaria alternata application foliaire azadirachta azadirachta indica azadirachtin azadirachtine carbendazim carbendazima carbendazime control de enfermedades disease control enfermedades de las plantas enfermedades fungosas extractos vegetales foliar application fongicide fungal diseases fungicidas fungicides helianthus helianthus annuus losses maladie des plantes maladie fongique pathogens perte plant diseases plant extracts