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peronospora, downy mildew (GB)
péronosporacées (F)

Synonymous (also vine peronospora) for the wrong person mildew; look there.

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

The two diseases are dealt with in a classic way sulfur (Powdery mildew) and copper sulphate respectively. Bordeaux mixture (Downy mildew) fought. But there are also increasing numbers of special ones fungicides or Plant strengtheners used. Control often has to be carried out several times during the growing season. When crossing new varieties will open today too resistance against both types of mushrooms. It should be noted that some types of ladybug that are among the most important beneficials count in viticulture, feed exclusively on mildew. However, this is of no importance when fighting in the vineyard.

Powdery mildew (oidium)

Powdery mildew is also called "Oidium" or "Oidium tuckeri" after the gardener William Tucker named who first discovered the mushroom in England in 1845. The causative agent of the disease is one of the tubular fungi (Ascomycota), the botanical name is "Erysiphe necator var. Necator" or "Uncinula necator var. Necator". The fungus was identified and described in North America as early as 1834. It was probably introduced to Europe via England in the early 1840s and subsequently spread rapidly across the continent. Together with the one that also came from North America a few years later phylloxera to a real disaster in European viticulture. Large parts of the vineyards were destroyed in many countries. In 1854,...

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