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Grapevine
decline or Esca - Phaeomoniella, Phaeoacremonium and Cylindrocarpon spp., Stereum hirsutum, Phellinus punctatus
Annemiek
Schilder, MSU Plant Pathology |
| Home > Scouting guide> grape decline or esca |
| Grapevine decline affects both young and old vines. Young vines often show stunted growth, small trunk size and reduced foliage. On older vines, yellowish or reddish patches may appear between leaf veins in mid- to late season, eventually leading to marginal and interveinal burning. Berries may show poor maturation and purplish gray flecks “measles.” The entire vine or part of it may die suddenly, usually during hot periods. Sometimes shelflike mushrooms can be found on the trunk. |
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Leaf
with marginal and interveinal “burning.”
Photo:
David Gadoury, Cornell. |
Berries
speckled with “measles.”
Photo: http://www.APSnet.org |
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| Causal fungi can infect
vines through roots and pruning wounds and become systemic in the plant.
Infected vines are often symptomless, so the disease can easily spread via
planting material. |
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