RESULTS

(5)

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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 .

Angular leaf spot | Tobacco

DISEASE: Angular leaf spot

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Pseudomonas syringae pv. tabaci

SOURCE: H. Shew

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.

Angular leaf spot | Tobacco

DISEASE: Angular leaf spot

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Pseudomonas syringae pv. tabaci

SOURCE: H. Shew

DISEASE: Angular leaf spot

HOST: Tobacco

Severely diseased leaf with extensive yellowing.

Angular leaf spot | Tobacco

DISEASE: Angular leaf spot

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Pseudomonas syringae pv. tabaci

SOURCE: H. Shew

DISEASE: Bacterial fasciation (Leafy gall)

HOST: Tobacco

Bacterial fasciation of tobacco.

Bacterial fasciation (Leafy gall) | Tobacco

DISEASE: Bacterial fasciation (Leafy gall)

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Rhodococcus fascians

SOURCE: R. Raabe

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.

Wildfire (Angular leaf spot) | Tobacco

DISEASE: Wildfire (Angular leaf spot)

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Pseudomonas syringae pv. tabaci

SOURCE: G. Lucas