Esca & Petri disease are caused by the same fungi Older plants - - PowerPoint PPT Presentation

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esca petri disease are caused by the same fungi
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Esca & Petri disease are caused by the same fungi Older plants - - PowerPoint PPT Presentation

Dec 15, 2023 153 likes •499 views

Esca & Petri disease are caused by the same fungi Older plants = esca apoplexy black measles Young plants = Petri disease black goo young vine decline young esca Esca J. rbez-Torres J. rbez-Torres J. rbez-Torres Esca J.

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Esca & Petri disease are caused by the same fungi

Older plants = esca

apoplexy black measles

Young plants = Petri disease

black goo young vine decline young esca

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  • J. Úrbez-Torres

Esca

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  • J. Úrbez-Torres
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  • J. Úrbez-Torres
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  • J. Úrbez-Torres

Esca

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Petri disease

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  • J. Úrbez-Torres
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Cause of Petri disease/esca in the US

Phaeomoniella chlamydospora Togninia minima (Phaeoacremonium aleophilum)

  • T. fraxinopennsylvanica (P. mortoniae)
  • T. viticola (P. viticola)
  • P. parasiticum
  • P. inflatipes
  • P. angustius
  • P. scolyti
  • P. alvesii
  • P. rubrigenum

Teleomorph (perfect stage) Anamorph (imperfect stage)

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Disease cycle of Petri disease and Esca Fall Winter Pruning wounds Infection of wood & toxin production Spring Decline Summer Fruiting bodies form

  • J. Úrbez-Torres

After W. D. Gubler, et al., UC Davis

Gubler, et al. Gubler, et al. Gubler, et al.

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Diplodia

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Fruiting bodies of Diplodia

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Other diseases & poor vine performance Black foot disease (vines to 8 yrs) “Cylindrocarpon” species Closely related to:

  • poor nursery stock
  • overcropping
  • water stress
  • wounding at planting…..
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Symptoms resemble water stress

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“Cylindrocarpon”

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Management Prevention!

  • Sort nursery stock – leave questionable material.
  • Delay fruiting. Cropping several tons in the 2nd year after

planting has been associated with these diseases.

  • Use of grow tubes also has been associated with these

diseases.

  • Irrigate new plantings for a few years before switching to

dryland production.

  • Soak dormant cuttings 30 min in hot water (122 F ). This has

not always been effective and must be combined with other methods.

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Other diseases & poor vine performance Phytophthora root rot – various species

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  • J. Cortell
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Other diseases & poor vine performance Armillaria root rot – “A. mellea”

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Botryosphaeria Eutypa

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“Cylindrocarpon” Esca

  • J. Úrbez-Torres
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Fungi found in Oregon on diseased grapevines

Armillaria sp. Phytophthora sp. Aspergillus niger Phaeoacremonium spp. Bionectria ochroleuca Phaeomoniella chlamydospora Botryosphaeria spp. Phoma spp. “Cylindrocarpon” destructans Phomopsis spp. “C.” obtusisporum Roesleria subterranea (=R. hypogaea) Diplodia sp. Seimatosporium spp. Eutypa lata Verticillium sp.

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“Bot” and “Eutypa” cankers

  • Neighboring trees?

Petri disease

  • Weeds?
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Diseases look similar

Management may not be We don’t know what is in OR

Early detection is important Unnoticed disease = lost $

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Acknowledgements

  • Dr. José Úrbez-Torres

Pacific Agri-Food Research Centre, Summerland, BC

  • Dr. George M. Leavitt

Madera Co., CA Farm Advisor, Emeritis

  • Dr. W. D. Gubler & lab

UC Davis