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RESULTS

(6)

DISEASE: Bacterial blight (Bacterial necrosis)

HOST: Grape

Stem necrosis of grape.

DISEASE: Bacterial blight (Bacterial necrosis)

HOST: Grape

Stem with cankers and discolored external tissues.

DISEASE: Bacterial blight (Bacterial necrosis)

HOST: Grape

Severe infection in vineyard is noted by dead canes. Symptoms are most severe in spring; shoot blight, occasional spots on leaves, and cankers are common.

DISEASE: Bacterial blight (Bacterial necrosis)

HOST: Grape

Leaf with necrotic spots and marginal necrosis. One-sided cracking of petiole tissue is common (not shown here).

DISEASE: Chocolate spot

HOST: Corn (Maize)

Leaf with dark brown, elongated spots surrounded by broad, yellow halos.

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.