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RESULTS

(11)

DISEASE: Angular leaf spot

HOST: Tobacco

Leaf with light brown, angular spots. The difference between this disease and wildfire of tobacco is that wildfire is caused by a strain that produces tabtoxin. It causes conspicuous halos around lesions and large parts of a leaf may turn yellow .

DISEASE: Angular leaf spot

HOST: Tobacco

Yellowing of adjacent tissues occur as spots age (midseason). It causes conspicuous halos around lesions. Large parts of a leaf may turn yellow.

DISEASE: Angular leaf spot

HOST: Tobacco

Severely diseased leaf with extensive yellowing.

DISEASE: Bacterial canker (Leaf spot)

HOST: Mume (Japanese apricot)

Leaves with spots surrounded by yellow halos.

DISEASE: Bacterial canker

HOST: Cherry

Cherry with necrotic internal tissues and external symptoms of ooze (gummosis) caused by systemic infection.

DISEASE: Bacterial canker

HOST: Cherry

Systemic infection of petioles and leaves.

DISEASE: Enterobacter bulb decay

HOST: Onion

Onion bulb with extensive soft, brown rot.

DISEASE: Internal yellowing

HOST: Papaya

Yellow discoloration of flesh. The affected area is soft and has an acrid odor.

DISEASE: Wildfire (Angular leaf spot)

HOST: Tobacco

Characteristic symptoms are necrotic, brown spots with angular margins surrounded by distinct yellow halos. The halos are caused by the production of tabtoxin.