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Red burner

Until the beginning of the 20th century, the cause of this also known as Rotbrenner vine disease was unknown, it was suspected nutrient deficiencies. In 1903, the Swiss Hermann discovered Müller-Thurgau (1850-1927) as the pathogen parasitic mushroom Pseudopezicula tracheiphila, after which the disease is sometimes named. The mushroom hibernates on withered leaves on the ground, this is also the main source of infection. The disease occurs mostly in shallow, stony and dry slopes after prolonged rainfall, while the sprouted spores infest from April to July the shoots and leaves,

Red Burner - leaf of red wine variety and leaf of white wine variety

The symptoms are yellow-brown (in white wine varieties) or ruby ​​red (in red wines) by the leaf veins limited and therefore appear angular spots. The discolored area is surrounded by a light green to yellow hem. The leaf main veins are clogged and thus the photosynthesis prevented. Later form at the discolored areas necrosis and the leaves wither. In very dry and hot weather, the discoloration remains, the leaves dry out very quickly and fall off. Rarely, bouquets are also affected, which is indicated by small black dots on the flowers recognizable. In this case, after the blossom also Verrieseln occur. The fungus is protective in the vineyard fungicides already combated preventively. Particularly endangered is the variety Pinot Noir ( Pinot Noir ). See also below Vine enemies,

Images: Copyright Bayer AG

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