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RESULTS

(27)

DISEASE: Bacterial canker

HOST: Tomato

Advanced stage of disease with reddish brown discoloration of vascular tissues (bottom). Healthy stem (top).

DISEASE: Bacterial canker

HOST: Tomato

Lesions on stems and sepals.

DISEASE: Bacterial canker

HOST: Tomato

Severe infection of calyx and internal infection of stem.

DISEASE: Bacterial canker

HOST: Tomato

Diseased tomato calyx and blossom.

DISEASE: Bacterial canker

HOST: Tomato

Fruit with bird's-eye spots and raised brownish centers surrounded by white halos.

DISEASE: Bacterial canker

HOST: Tomato

Close-up of bird's-eye spots on green fruit.

DISEASE: Bacterial canker

HOST: Tomato

Ripe tomato infected with Clavibacter michiganensis subsp. michiganensis, which causes light brown lesions surrounded by white halos, and Pseudomonas syringae pv. tomato, which causes small, black, raised lesions.

DISEASE: Carrot yellows

HOST: Carrot

Flowers with shoot proliferation (witches’-broom) (left). Healthy flower (right). Virescence and phyllody of flower parts are common.

DISEASE: Carrot yellows

HOST: Carrot

Carrot with proliferation of roots. Initial symptoms include yellowing and narrowing of veins of young leaves. The entire leaf later becomes necrotic.