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RESULTS

(12)

DISEASE: Bacterial blight (Brown stem)

HOST: Celery

Lesions are necrotic and circular to angular. Some have yellowish halos. Older lesions become brown and dry.

DISEASE: Bacterial blight (Brown stem)

HOST: Celery

Ooze from lesion on celery leaf.

DISEASE: Bacterial blight (Brown stem)

HOST: Celery

Characteristic brown discoloration of petioles, which is more evident on inside of petiole close to the crown. Parenchyma tissues are firm and brown.

DISEASE: Bacterial blight

HOST: Hazelnut

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.

DISEASE: Bacterial canker and blast

HOST: Apricot

Young infected twig with droplets of bacterial ooze on stem.

DISEASE: Bacterial canker and blast

HOST: Apricot

Bacterial canker has many symptoms. Typical symptoms are brown, sometimes reddish brown, internal tissues and rough, cracked bark.

DISEASE: Bacterial canker and blast

HOST: Apricot

Infected apricot with sparse foliage (some twigs with no foliage) and a discolored area exposed where bark was removed.

DISEASE: Bacterial canker and blast

HOST: Apricot

Fruit spot phase with numerous reddish necrotic spots.

DISEASE: Bacterial canker

HOST: Hazelnut

Primary symptoms are failure of buds to break and withering and death of new foliage in spring. Dead leaves remain attached to limbs after normal leaf fall.