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water shoots

Description (also water drive, water traveler, Geiltrieb) for auxiliary drives on Rebstock resulting from a "sleeping eye “Have formed. Normal fruit shoots are formed from the axillary buds created in the previous year, which after the pruning remained as winter eyes on the annual wood. Water shots, on the other hand, form adventitious on the wood of several years, which are not already laid out, but if necessary newly from reembryonalized cells of the cambium be formed. An old term is "brain drive" (brain stands for head). Because the buds often form on the head of the main stem, where the vine is pruned down to one or two rods or cones during winter pruning. In contrast, secondary shoots that form the base or roots at the bottom of the stem are referred to as basal shoots or root shoots. In the literature, however, no distinction is often made between these secondary drives.

Wasserscherschosse - vine, vine trunk cleaner with brush and vine

This radical reduction in shoots and buds induces the new formation of adventitious buds in the interior of the cambium from trunk areas that have not yet been too heavily wooded. If the head is too heavily wooded, water shots can also form on the trunk or at the base of the trunk below the earth's surface. Some grape varieties such as Petit Bouschet tend to form water shots, others such as Trollinger ( Schiava Grossa ) drive out of the old wood only with great difficulty. In general, the water shoots do not bear fruit, because they were not created (which is a requirement) in the previous year.

The functional purpose of water shoots for a plant is to replace them quickly in an emergency. This is the replacement for lost shoots and the quick guarantee of additional leaf mass for the photosynthesis, the nutrition of the vine and the reconstruction of the crown structure. Therefore, they are very fast-growing and long-sprouting, but only develop a weak, brittle wood body and have poorly trained fruit plants. Since they represent a water- and nutrient-depriving competition for the growth of the fruit shoots, they are basically still in the spring at the time of sprouting removed (broken out). There are also mechanical devices for this (see a vine trunk cleaner in the middle of the picture).

But they can also be used to rejuvenate old vines. If, for example, the main trunk is too old, split, rotten or infested with vermin and fungi, it is cut over the attachment point of the water basin and the water basin is raised for it. This then forms the new main stem. The vine shown in the picture on the left was damaged by late frost. For this reason, favorable water gaps were left in order to be able to rebuild the vine. Shot of water should not be confused with suckers, which develop from the summer buds in the leaf axils of annual fruit shoots. Therefore, water guns and miser drives are not the same thing (although they are often mistakenly referred to as identical). See also complete lists under Weingarten Care (Activities) and grapevine (on the subject of the vine).

Left: By Bauer Karl - Own work, CC BY 3.0 , Link
Middle picture: Von Bauer Karl - Own work, CC BY 3.0 , Link
Right: By
Bauer Karl - Own work, CC BY 3.0 , Link

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