Pseudopezicula tracheiphila
The Red burner is a occurring in the wine-growing plant disease, which manifests itself by appearing scorched spots on the leaves. It belongs to the family of Burner diseases ( anthracnose ). This is caused by the fungus disease Pseudopezicula tracheiphila (syn. Pseudopeziza tracheiphila Müll. - Thurgau. ), Which is calculated depending on the conception of the family Helotiaceae or Dermateaceae. He can be fought by fungicides.
Description and Biology
The infestation by the fungus is found in white grape varieties by first oily, later brownish spots with yellow edges, with red grape varieties by ruby- red spots. In contrast to the similar appearance of the downy mildew stains are always limited by leaf veins and edges, therefore, often wedge-shaped. The affected tissue dries out and dies.
The spots arise from the fact that the fungus clogs the water pipes of the sheet. The affected areas die thereby. In extreme cases, even the whole leaf drops.
The fungus overwinters in dropped leaves. In the spring it forms with adequate soil moisture and temperatures above 10 ° C blackish, bowl -shaped fruiting bodies with a diameter of 0.5 mm. This set, especially after rainfall in April and May, In addition to free spores that infect the fresh leaves of the vines. High infection pressure increases the risk of increased coulure of flower.