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Plum Pox Virus

Plum Pox Potyvirus (Sharka)
Butternut Canker Plum Pox Potyvirus
R. Scorza, USDA

 

Hosts:

Prunus species, such as peach, plum and apricot, nectarines and ornamental Prunus species.  Cherries are resistant to most strains of the virus.

 

Commodities Affected:
Fruits and Vegetables, Nursery, Ornamentals, and Turf

 

Threat:

This disease causes significant yield reduction in infected trees. Chlorotic rings and blotches develop on leaves. Immature fruit will drop from infected trees; infected fruit can be deformed, show ringspot symptoms and have poor flavor, reducing fruit quality.  There are also regulations prohibiting export of infected fruit and budwood.

 

Distribution:

The disease is found in Europe, Syria, India, Turkey and Chile.  In 1999, it was found for the first time in North America, in peach orchards in two Pennsylvania townships. In subsequent years has been found in Canada (Ontario and Nova Scotia), as well as New York and Michigan.  Eradication efforts have limited the spread of this disease in the US and Canada.