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RESULTS

(9)

DISEASE: Bacterial seedling blight

HOST: Rice

Dead and light brown, infected seedlings in nursery tray.

DISEASE: Goss's bacterial wilt and blight

HOST: Corn (Maize)

Wilted, dying plants. Leaves have gray to light yellow stripes and irregular margins that follow leaf veins. Systemically infected plants usually have orange vascular bundles.

DISEASE: Goss's bacterial wilt and blight

HOST: Corn (Maize)

The disease causes necrotic leaf lesions, which typically have dark flecks (freckles) within the lesions (not seen here).

DISEASE: Grain rot

HOST: Rice

Close-up of diseased grain. Infected portions of lemma and palea are purplish to dark brown.

DISEASE: Grain rot

HOST: Rice

Discolored and withered hulls of infected panicles. A brown margin between the infected and healthy parts of the grain is a diagnostic feature.

DISEASE: Stewart's wilt

HOST: Corn (Maize)

Wilted seedlings resulting from systemic invasion.

DISEASE: Stewart's wilt

HOST: Corn (Maize)

Leaf blight is the dominant symptom of this disease. Lesions begin as gray-green to yellow in color and turn brown in time.

DISEASE: Stewart's wilt

HOST: Corn (Maize)

Flea beetle and scars caused by feeding damage. The beetle is a vector and is an overwintering site for the bacterium.

DISEASE: Stewart's wilt

HOST: Corn (Maize)

Young wilted plant with pale green and yellow streaks on leaves.