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RESULTS

(9)

DISEASE: Bacterial leaf spot (Head rot)

HOST: Cauliflower

Leaves with tiny lesions surrounded by large halos.

DISEASE: Bacterial leaf spot (Head rot)

HOST: Cauliflower

Section of a cauliflower head with discolored, infected tissues.

DISEASE: Bacterial leaf spot (Head rot)

HOST: Lettuce

Leaf with black, greasy spots that tend to be vein delimited. Lesions begin as small, angular, water-soaked lesions that coalesce, resulting in large necrotic areas.

DISEASE: Bacterial vascular necrosis and rot

HOST: Beet

Cross section of sugar beet with reddish color in vascular bundles and adjacent tissues.

DISEASE: Bacterial vascular necrosis and rot

HOST: Beet

Advanced stage of disease with extensive rot.

DISEASE: Bacterial vascular necrosis and rot

HOST: Beet

Early stage of systemic infection of young plant noted by blackening of midribs and veins.

DISEASE: Bacterial vascular necrosis and rot

HOST: Beet

Infected vascular bundles caused by systemic infection by the bacterium.

DISEASE: Bacterial vascular necrosis and rot

HOST: Beet

Black discoloration of petioles resulting from systemic infection.

DISEASE: Marginal leaf blight

HOST: Lettuce

Marginal leaf blight first appears as slimy wilting of leaf margins. Small, reddish lesions may be seen on leaf blades. Infected tissues turn brown to black in time.