A plant from the windbreak family that is widespread in Europe. A dense network of knotty, thickened root strands is formed in the soil down to a depth of two metres, from where new shoots keep emerging. This is why superficial weeding does not bring success. During growth, the plant makes circular counter-clockwise search movements when viewed from above in order to be able to climb up a suitable surface. The name is derived from this. In viticulture, it is considered a weed; among other things, phytoplasmas (microorganisms) contained on it can be transmitted to nearby vines by certain types of cicadas, thereby causing blackwood disease.
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Egon Mark
Diplom-Sommelier, Weinakademiker und Weinberater, Volders (Österreich)