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Root rot

This threatening disease of the vine (also called accidental disease) is caused by various fungi, either individually or in combination. The most common ones are Armillaria mellea (Hallimash or hedge fungus), Roesleria hypogaea and Rosellinia necatrix. The vines show a whitish covering under the bark at the lower parts and the root (mycelium plaques = area of fungal threads). These are particularly common in vineyards with earlier tree populations. The vines gradually die or even die suddenly (see also under apoplexy). Root rot can also be caused or encouraged by excessively damp soil (wetness stress) and animal pests such as phylloxera and larvae of root flies, as fungi and other harmful substances such as bacteria can easily penetrate the feeding sites. The fungi are controlled by smoking. In the event of waterlogging, root mold (Dematophora necatrix) may also occur. A specific form is the Cylindrocarpon root rot (Cylindrocarpon cancer). See also a list of all diseases and pests under vine enemies.

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