Designation (also water sprout, water voyage or Geiltrieb) for side shoots on Rebstock arising from a "sleeping eye "Have formed. Normal sprouts are formed by the axillary buds that were created last year pruning when winter eyes stopped on the one-year wood. On the other hand, water shoots are formed adventitious on perennial wood, which are not already laid out, but if necessary newly from reembryonalisierten cells of the cambium be formed. An old name is "brain drive" (brain stands for head). Because the buds are often formed at the head of the main trunk, where the vine is cut back in winter pruning to one or two rods or cones.