[Inventory of cultivars, rootstocks and indicator plants of pome fruits, stone fruits and citrous fruits at the national nursery of Escaroupim. Result of the health control of pome and stone fruit producing plants [Portugal]]

citrus control de enfermedades disease control indicator plants malus micoplasmosis multiplication des plantes mycoplasmose mycoplasmoses pepiniere plant nurseries plant propagation plantas indicadoras plante indicatrice portainjertos prunus pyrus rootstocks virose viroses virosis viveros