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RESULTS

(10)

DISEASE: Bacterial leaf spot (Head rot)

HOST: Lettuce

Leaf with black, greasy spots that tend to be vein delimited. Lesions begin as small, angular, water-soaked lesions that coalesce, resulting in large necrotic areas.

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.

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheat

Water-soaked stage of leaf streak.

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheat

Interveinal brown streaks and blotches on wheat leaves, a late stage of disease. Symptoms may be confused with other diseases.

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheat

Brownish black streaks and blotches on glumes.

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheat

Leaves with blighted leaf tips, and blades with brownish red streaks.

DISEASE: Olive knot

HOST: Olive

Multiple infections of young stems. The bacterium invades vascular tissues during certain times of the year and may be isolated from branches that appear healthy.

DISEASE: Olive knot

HOST: Olive

Tree with knots/galls on branches along with twig dieback, which is associated with knots. Fusarium and Diplodia spp. infect through knots and are thought to be main reason for dieback.