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RESULTS

(8)

DISEASE: Bacterial leaf blight

HOST: Carrot

Blight of flower parts.

DISEASE: Bacterial leaf blight

HOST: Carrot

Leaf lesions begin as water-soaked spots that progress to small, yellow, angular spots and later expand to necrotic lesions with yellow halos.

DISEASE: Bacterial leaf blight

HOST: Carrot

Bacterial ooze on flower stalk from systemic invasion of the pathogen.

DISEASE: Bacterial leaf streak

HOST: Oat

Leaf with long, dark red streaks.

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass

Lesions on leaves first appear as water-soaked, translucent, long, narrow streaks. They later turn brown and necrotic and often coalesce into blighted areas.

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass

Close-up of leaf with brown necrotic streaks.

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).