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Around The Vineyard
Around The Vineyard
Cross Section of Esca infected Vine
free of A. vitis. There are diagnostic tools for the Bot Canker, Eutypa,
detection of pathogenic (tumor-inducing) strains of Phomopsis Die Back, and Other Cankers
A. vitis. However, often times the tests may yield
false negative results. Various pathogens can cause canker diseas-
es in the vineyard. Bot-canker or dead arm
Petri Disease, Young Vine Decline, Esca disease is caused by different species in the
Botryosphaeriaceae family. The most severe Bot-
The disease caused by Cadophora, canker species is Lasidiplodia theobromae, while
Phaeoacremonium and Phaeomoniella species in weaker symptoms are caused by Diplodia spp.
young vines is known as young vine decline. In Eutypa dieback is caused by different species in
older vines, the disease caused by the same fungal the Diatrypaceae family. The best characterized
pathogens is known as Esca. The disease is chronic and known species is Eutypa lata, but species of
when vines express a gradual decline of symptoms Criptovalsa, Diatrypella, and Eutypella can also
over time, or acute when the vines decline and cause canker disease in grapevines. In my lab we
die within a few days. These acute symptoms are characterized Seimatosporium species as a fungal
known as the apoplectic stage of the disease. It pathogen that causes decline and cankers in grape-
is not uncommon during the apoplectic stage of vines, but within the same fungal group others
the disease to see dead vines carrying mummified have reported Pestalotoipsis and Truncatella to
grape bunches. cause disease in grapevines. Another canker patho-
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