This disease such as downy mildew, was imported from the Americas. He made his first appearance in English and some greenhouses and then spread rapidly throughout Europe. It occurs on the screws since the time of flushing completely covering the whole feature white film shoots. The mildew on the berries has particularly serious consequences leading to the arrest of the development of the epidermis and the resulting split the berry. As prevention using sulfur, are also products synthesis to combat powdery mildew (citotropici and systemic pesticides).
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