El cultivo del manzano

alternaria apples application rates control de enfermedades cultivation cultivo cultural methods defoliation desrame disease control dose d'application enfermedades fungosas ensemencement fertilisation fertilización fertilizer application fongicide fungal diseases fungicidas fungicides lopping lutte physique maladie fongique manzana mode de culture physical control poda podosphaera leucotricha pomme pratique culturale pruning siembra sowing taille variedades varieties yaracuy