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RESULTS

(6)

DISEASE: Bacterial leaf spot (Canker)

HOST: Ginkgo

Ginkgo leaf with dark brown, elongated necrotic spots.

DISEASE: Bacterial leaf spot (Canker)

HOST: Ginkgo

Ginkgo with leaf spots and canker on stem.

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: Yellow wilt

HOST: Beet

Symptoms of this disease are yellow leaves, wilting, and then collapse. There may be dwarfing of new leaves, yellowing of sectors, and chlorosis of veins.

DISEASE: Yellow wilt

HOST: Beet

Yellowing and dwarfing of sugar beet (left), an early stage of disease.