Wilt disease (grapevine)

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Wilt disease can appear in various forms on grapes and berries of grapevines . The intensity varies depending on the variety and year.

The causes can be:

plant physiological biotic abiotic

After the first symptoms of the damage become visible:

  • Symptoms of damage beginning on the stalk of the grapes: The first symptoms are dark, sharply demarcated necrotic areas on the stalk (mostly in the branch branches). These symptoms can be seen on the stems from flowering through to the onset of maturity. These are stalks .
  • Symptoms of damage starting with the berries: Berries lag behind in development in the ripening phase and sag, wither, taste bland and sour, dry up. As a result, the pedicle also begins to necrotize. This is grape wilt (berry wilt, Zweigelt disease).

  • Stalk paralyzes on the small berry sticks in the Blaufränkisch variety.

  • Stalk paralyzes in a very advanced stage of the Grüner Veltliner variety.

  • Grape wilt of the Zweigelt variety.

  • Zweigelt grapes damaged (burnt or scalded) by extreme temperatures.

literature

  • Karl Bauer et al .: Viticulture . 8th edition 2008, Österreichischer Agrarverlag, ISBN 978-3-7040-2284-4
  • Edgar Müller, Oswald Walg, Hans-Peter Lipps, "Viticulture", Eugen Ulmer Verlag, 2008, ISBN 978-3-8001-1241-8
  • Horst Diedrich Mohr: color atlas diseases, pests and beneficial insects on the grapevine . Eugen Ulmer, 2005, ISBN 3-8001-4148-5 .
  • Helga Reisenzein, Friedrich Polesny, Erhard Höbaus: Diseases, pests and beneficial insects in viticulture . Österreichischer Agrarverlag, 5th edition, Vienna 2008, ISBN

Web links

Individual evidence

  1. ^ Karl Bauer et al .: Viticulture . 8th edition 2008, Österreichischer Agrarverlag, S 387, ISBN 978-3-7040-2284-4