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RESULTS

(21)

DISEASE: Aster yellows

HOST: Wheat

Healthy head (left) and diseased head (right). Diseased seedlings may die within 2 to 3 weeks. Infected heads of surviving plants are small and sterile, with distorted awns.

DISEASE: Bacterial blast and black pit

HOST: Citrus (Lemon)

The term "black pit" refers to black lesions on fruit, which may be specks or large, sunken pits as seen here. They also may be light tan, later becoming reddish brown to black.

DISEASE: Bacterial leaf blight

HOST: Sorghum

The disease begins with interveinal water-soaked streaks that broaden into irregularly shaped areas with necrotic centers and red margins.

DISEASE: Bacterial leaf blight

HOST: Wheat

Diseased leaves with whitish blotches. Initial water-soaked spots become necrotic and progress from gray-green to tannish white.

DISEASE: Bacterial leaf blight

HOST: Wheat

Diseased leaves with whitish blotches. The disease begins as water-soaked spots and then become necrotic and progresses from gray-green to tannish white.

DISEASE: Bacterial leaf blight

HOST: Wheat

Leaves with reddish tan necrotic lesions.

DISEASE: Bacterial leaf spot

HOST: Sorghum

Leaf with red and necrotic streaks along veins.

DISEASE: Bacterial leaf spot

HOST: Sorghum

Clustering of small purplish lesions in localized region of leaf.

DISEASE: Bacterial leaf streak

HOST: Sorghum

Symptoms typically begin as water-soaked streaks expanding into irregular-shaped, reddish brown streaks. Symptoms are similar to bacterial leaf stripe.