[Effect of plastic covering [of fruit tree] on rotting in sweet cherry]

abri plastique agrietado del fruto arbre fruitier botrytis damage enfermedades fungosas fruit cracking fruit growing fruit trees fruticultura fungal diseases infection maladie fongique microclima microclimat microclimate monilia noruega norway plastic film covers podredumbres pourriture precipitation prunus avium rots spraying