This vine disease, which occurs mainly in very young vines, was first described in 1961 in France. She is from one mushroom complex of the genera Campylocarpon, Cylindrocarpon, Cylindrocladiella and Ilyonectria. The mushrooms colonize the channels of the xylem ( Xylem ) and clog them. Impacts are weaker shoot growth, reduced leaf mass and shortened internodes With chlorotic Scroll. The roots are black-red discolored with soft areas and can subsequently rot. The wood inside the Support base may be red or violet discolored.
The eponymous symptom becomes visible only in a cross-section of the trunk. The inner xylem tissue turns black and often shows a brown spongy consistency. The name denotes the black-colored, necrotic Central cylinder of the base (see picture on the right). As a defense machanism, the plant can develop secondary roots. The symptoms are similar Petri's disease, There are no effective measures to effectively combat the disease. It is supported by stagnant, loamy soils and over-fertilized vines. See also a listing of all diseases below Vine enemies,
Images: © Experiment Center Laimburg