is a so called malbianco "or" fog. " It is an ascomycete fungus, apparent to the family of Erysiphaceae: ascofora form: Uncinulla necator.
form conidiophores: Oidium Tucker.
Attack Symptoms always young tissues of the plant, never the old ones. On the upper surface of the leaf appears an efflorescence moldy-looking web of gray-white, passing into whitish powder. Against the light you see discolored patches, translucent. The leaf blade shrivels up has the typical "cup." Finally, the leaf necrorotizza. The berries appear to be browning with Muffett and black specks. You have severe reductions in growth and productivity.
infection process
Powdery mildew is a ectoparasitta remains outside the tissue of the vine develops haustoria with which absorbs nutrients neccesari to its growth.
Control Methods
estimates
Planting density has influence on the development of pathogens, pruning and training system can help to ease the aeration treatments. Moreover, a balanced pruning avoids creating microclimatic conditions favorable to the fungus, such as the lack of light and high humidity.
Prodotti antoicidi
-Zolfo
-Dinocap
-Quinoxifen
La lotta biologica utilizza un fungo antagonista dell'oidio, che viene somministrato in miscela con olio minerale.
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