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RESULTS

(9)

DISEASE: Bacterial blight (Leaf spot)

HOST: Clover

Diseased leaf with elongated, reddish brown lesions, especially numerous on the margins.

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

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.

DISEASE: Bacterial dieback of nectarine

HOST: Nectarine

Dark cankers on last year's twig. Symptoms of bacterial dieback of nectarine are identical to those of bacterial dieback of peach.

DISEASE: Bacterial dieback of nectarine

HOST: Nectarine

Diseased young twigs.

DISEASE: Bacterial dieback of nectarine

HOST: Nectarine

Bacterial invasion of trunk caused reddish brown discolored area. Symptoms of bacterial dieback of nectarine are identical to those of bacterial dieback of peach.

DISEASE: Bacterial dieback of nectarine

HOST: Nectarine

Discolored vascular tissues and gummosis on infected twig.

DISEASE: Bacterial dieback of nectarine

HOST: Nectarine

Symptoms of the disease include leaf spots (top leaf). Similar appearing leaf spots may be caused by Xanthomonas arboricola pv. pruni (bottom leaf).

DISEASE: Bacterial dieback of nectarine

HOST: Nectarine

Dying tree caused by systemic invasion of the bacterium. Symptoms of bacterial dieback of nectarine are identical to those of bacterial dieback of peach.