This vine disease, which occurs mainly in very young vines, was first described in France in 1961. It is from one mushroom complex of the genera Campylocarpon, Cylindrocarpon, Cylindrocladiella and Ilyonectria. The fungi colonize the xylem's channels ( Xylem ) and clog them. Effects are weaker shoot growth, reduced leaf mass and shortened internodes With chlorotic Scroll. The roots are black-red colored with soft areas and can then rot. The wood inside the Support base can be red or purple in color.
The eponymous symptom only becomes visible when the trunk is cross-sectioned. The inner xylem fabric turns black and often shows a brown spongy consistency. The name denotes the black colored, necrotic Central cylinder of the pad (see picture on the right). As a defense mechanism, the plant can develop secondary roots. She shows similar symptoms Petri's disease, There are no effective measures to effectively fight the disease. It is promoted by waterlogged, loamy soils and excessively fertilized vines. See also a list of all diseases below Vine enemies,
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