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RESULTS

(15)

DISEASE: Bacterial leaf streak and bulb rot

HOST: Onion

The disease is characterized by dark spots on wrapper scales and/or reddish brown discoloration of inner scales.

DISEASE: Bacterial leaf streak and bulb rot

HOST: Onion

Onion with dead and rotted leaf at base of stem. Typical symptoms are water-soaked, dark green lesions that become oval with time, along with streaks and tipburn.

DISEASE: Bacterial leaf streak and bulb rot

HOST: Onion

Browning and decay of bulb following inoculation with Pseudomonas viridiflava.

DISEASE: Bacterial leaf streak and bulb rot

HOST: Onion

Close-up of diseased leaves.

DISEASE: Bacterial leaf streak and bulb rot

HOST: Onion

Bulb rot with gray, bluish symptoms. Reddish brown discolorations also may occur.

DISEASE: Bacterial palea browning

HOST: Rice

Early stage of disease with browning of palea.

DISEASE: Bacterial palea browning

HOST: Rice

Browning of palea begins with water-soaked lesions that later turn dark brown. Infected grains become brown after milling.

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Barley

Black chaff is characterized by water-soaked and darkened glumes on barley heads and streaks and stripes on leaves.

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Barley

Leaf with linear, water-soaked lesions that turn necrotic and brown. Flakes of dry bacterial exudate are apparent on the lesions. The pathogen also causes black glume of barley.