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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: Bacterial blight and bacterial leaf streak

HOST: Rice

Xanthomonas oryzae pv. oryzicola (bacterial leaf streak) causes water-soaked streaks with yellow ooze (left side), and X. oryzae pv. oryzae (bacterial blight) causes brown streaks that have turned white (right side).

DISEASE: Syringae leaf spot

HOST: Tomato

Leaves with brown necrotic lesions and chlorotic margins. Symptoms vary greatly among cultivars. Some have black or brown lesions with bright yellow, chlorotic areas and others do not have yellowing.