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Latin term for the formation of band-like cross-sectional shapes in plants (also vein banding, banding, zigzagging). The causes of this genetic disorder are damage caused by viruses and bacteria, in particular by these fungal infections introduced into the plants, mite infestation as well as chemicals and spontaneous mutation. The affected plants or plant parts are usually called comb forms or cristates. This growth abnormality manifests itself in the vine by widening and flattening of shoots, as if several adjacent shoots had grown together. Among other things, it is a typical symptom of brushwood disease. See also under vine enemies.

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