A method used mainly with table grapes (and formerly also with fruit trees) to improve fruit set. This involves cutting out an approximately 0.5 centimetre wide ring (fruit belt) from the phloem of the leading tissue around the stem or a shoot. The resulting interruption of nutrient transport puts the vine under extreme stress. As a protective measure to preserve the species, ripening occurs earlier and the berries grow larger. The vine does not die, but closes the wound by means of callus. This method works particularly well with seedless varieties such as Sultana. See also a list of all activities under vineyard care.
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Roman Horvath MW
Domäne Wachau (Wachau)