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RESULTS

(8)

DISEASE: Bacterial leaf spot (Bacterial necrosis)

HOST: Cassava

Cassava with yellowish leaves and water-soaked, angular spots. The disease is primarily on foliage, although the pathogen may invade stem buds and young branches.

DISEASE: Bacterial leaf spot (Bacterial necrosis)

HOST: Cassava

Cassava with brownish lesions and blackish edges. Leaves turn yellow with multiple infection sites.

DISEASE: Bacterial wilt

HOST: Alfalfa

Longitudinal section of defined brown gum pockets on inner surface of root bark.

DISEASE: Bacterial wilt

HOST: Alfalfa

Infected plant (left) with typical symptoms of stunting and chlorosis. Other characteristic symptoms are spindly stems and small distorted leaflets. Healthy plant (right).

DISEASE: Bacterial wilt

HOST: Alfalfa

Diseased plant with chlorotic leaves.

DISEASE: Bacterial wilt

HOST: Alfalfa

Cross sections of diseased roots with defined brown gum pockets on inner surface of bark. Healthy root (upper left). Other sections represent increases in disease severity.

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).