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RESULTS

(10)

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 leaf spot

HOST: Hawaiian ticktrefoil

Hawaiian ticktrefoil with orange-yellow lesions surrounded by broad yellow halos.

DISEASE: Multiplier disease

HOST: Strawberry

Multiplier disease causes production of numerous crowns along runners.

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.

DISEASE: Wildfire

HOST: Soybean

Close-up of lesions with large, yellow halos.

DISEASE: Wildfire

HOST: Soybean

Leaf with brown necrotic spots with yellow halos. During dry weather, lesions become dry and dead areas tear off, leaving a tattered appearance.

DISEASE: Witches'-broom

HOST: Alfalfa

Alfalfa plant (center) exhibiting stunting and proliferation of stems. Other symptoms are small, rounded, chlorotic, often puckered leaves and a yellowish cast.