BACTERIAL BLIGHT
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Hazelnut

SOURCE:
J. Pscheidt
DISEASE:
Bacterial blight
HOST:
Hazelnut
(Corylus americana)
Diseased young tree with discoloration of the cambium. Dieback of young twigs and branches is characteristic. Other typical symptoms are bud and twig necrosis and small, angular or round, water-soaked leaf spots.
PATHOGEN:
Xanthomonas arboricola pv. corylina