Yugoslavia - Fruit tree virus diseases and their control - Report to the government.

aetiology arbre fruitier bourgeon buds certification des plantes ciruela control de enfermedades disease control disease surveillance disease transmission enfermedades de las plantas ensayo etiologia etiologie experimentation fruit trees losses maladie des plantes perte plant certification plant diseases plant protection plantation planting plums protection des plantes prune testage testing transmission des maladies vecteur de maladie vectores vectors vigilancia de enfermedades virose viroses virosis yema (planta)