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22.794 Keywords • 48.336 Synonyms • 5.299 Translations • 7.909 Pronunciations • 152.006 Cross-references

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Fair weather fungus

Popular name for the real mildew; look there.

Designation for two very dangerous, by mushrooms caused vine diseases. They come from North America and were introduced to Europe with contaminated vine material only in the second half of the 19th century. Both types of fungi are among the biotrophic parasites that means that they feed on living cells of the infected host. The two mildew diseases are often confused, less because of the disease symptoms, which are fairly obvious, but because of the confusingly similar names. There are plant-specific powdery mildew fungi, for example for apples, peas, cucumbers, roses, spinach and vines. The mushrooms are strictly host-specific, meaning they can only live on their host.

The two diseases get along in the classic way sulfur (Powdery mildew) and copper sulphate or. Bordeaux mixture (Downy mildew) fought. Increasingly, but also special fungicides or Plant strengtheners used. In the growing season, control often has to be repeated several times. At the intersection of new varieties will also be on today resistance value against both types of mushrooms. It should be noted that some types of ladybug that's the most important beneficials in viticulture count, feed exclusively on mildew. But this has no meaning in the fight in the vineyard.

Powdery mildew (Oidium)

The powdery mildew is also called "Oidium" or "Oidium tuckeri" after the gardener William Tucker named, who first discovered the fungus in 1845 in England. The causative agent of the disease is one of the ascomycota fungi, the botanical name is "Erysiphe necator var. Necator" or "Uncinula necator var. Necator". The fungus was already identified and described in 1834 in North America. He was probably introduced to Europe in the early 1840s via England and spread rapidly throughout the continent. This led together with the also from North America a few years later phylloxera a true disaster in European viticulture. Large parts of the vineyards were destroyed in many countries. In 1854, only one-tenth of the normal amount could be harvested...

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