bunches of grapes affected by powdery mildew or oidium with yellow leaves.

affected agriculture background berry branch bunches bushes closeup color cottage disease diseased diseases downy false fertilizer food fresh freshness fruit fungal fungi garden grape grapes green harvest hazardous healthy infection injuring leaf leaves mildew mold mushrooms natural nature oidium organic outdoors pathogen plant powdery rotten sick spores spots spray spread summer uncinula vine vineyard viticulture white wine yellow