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epicormic shoot

entre-coeur (F)
succhione (I)
chupón (ES)
bastard branch (GB)

Designation for the side from the Blattachseln the main shoot growing out of the vine, Synonyms are Aberzahn, Dolder, Drohler, Eberzahn, Grandson, Geize, Irxe, Kindlein, Ohrlaub and Uchse. In part, but also referred to the growing on Geiztrieben grapes. The Geiztriebe form from the named as Sommerknospe eye one Triebes, The adjacent winter bud will then grow into the new summer shoot next spring. Especially at an early age tops of the main shoots, the summer bud can grow into a respectable runner, which can even flower and fruit in the lower part. Most of the time, however, the stinginess remains small or does not drive at all. Then his bud is due to insufficient timber maturity in the following winter. Each grape variety tends more or less strongly to the training of Geiztrieben. By a vigorous document the growth is promoted.

Geiztrieb and Geiztraube

For varieties with low apical dominance and strong tendency to Geiztriebbildung drive these lateral ramifications early in the summer from the leaf axils of the growing main stem from. Such Geiztriebe carry then also Gescheine, from which develop small grapes. These mature, however, because of the later blossom not enough anymore, are still green and sour at the time of the harvest and therefore have to be removed. Old names for the Geiztrauben are Dolder, Drohler or Härlinge, In the past, it was also a simple, acidified wine won, in Austria he was called "Irxenwein". Geiztriebe were previously broken out in principle before flowering (auszubizt), today they are left partly on the floor. Your leaves can namely as a valuable additional assimilation surface in the photosynthesis serve.

Give growing shoot tips auxins (Plant hormones), which suppress the expulsion of the miser buds in the subsequent drive sections. With increasing distance to the tip of the shoot, the effect of the hormone is lost, so that first in the lower part Geiztriebe can grow out. When the shoot tip of the main shoot is culminated, the apical dominance of the long drive is eliminated, so that Geiztriebe can form everywhere. Sometimes only the top miser will drive under the capped tip. The outgrowing Geiztrieb then takes over the Apikaldominanz and continues the growth in length of the main drive replacement, with a slight curvature at the lateral Austriebsbasis and slightly thinner Internodien.

Even with an early failure of the main shoot can develop from miser buds fully functional long shoots, which, however, are characterized by a late flowering and a reduced Gesalt approach. The secondary shoots growing from the lower trunk area are called water shoots designated. However, these do not arise as the Geiztriebe from axillary buds, but from adventitious, Therefore, water cannons and Geiztriebe are basically considered to be different (although they are falsely referred to as identical in many sources very often). See Listing relevant keywords below grapevine,

Picture left: By Bauer Karl - Own work, CC BY 3.0 , Link
Picture right: By Bauer Karl - Own work, CC BY 3.0 , Link

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