Melanosis: nf Like powdery mildew, downy mildew, anthracnose, black rot, white rot, root rot etc., melanosis is a fungal disease of the vine caused by a fungus.
It is native to America, occasionally appearing in European vineyards, especially on rootstocks. This disease is favored by a humid climate. In fact, as with mildew, water is necessary for the germination of conidia (spores ensuring the multiplication of the fungus). Melanosis ...
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