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RESULTS

(13)

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 fasciation (Leafy gall)

HOST: Tobacco

Bacterial fasciation of tobacco.

DISEASE: Bacterial leaf blight and rot

HOST: Orchid

Orchid hybrid (Odontoglossum × Memoria Martin Orenstein 'Lulu') with large, brown, infected area on leaves with water-soaking at margin between healthy and diseased tissues.

DISEASE: Bacterial leaf spot

HOST: Peanut

The disease causes water-soaked lesions, particularly on upper leaf surfaces. Lesions enlarge and later display brown necrotic areas. Leaflets become chlorotic and shed prematurely.

DISEASE: Bacterial wilt

HOST: Peanut

First sign of disease is slight drooping or curling of leaves. As the plant declines, foliage turns yellow, followed by wilt and death of stems.

DISEASE: Bacterial wilt

HOST: Peanut

Advanced stage of disease with death of plants.

DISEASE: Bacterial wilt

HOST: Peanut

Vascular discoloration of taproot.