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RESULTS

(7)

DISEASE: Bacterial palea browning

HOST: Rice

Early stage of disease with browning of palea.

DISEASE: Bacterial palea browning

HOST: Rice

Browning of palea begins with water-soaked lesions that later turn dark brown. Infected grains become brown after milling.

DISEASE: Brittle root

HOST: Horseradish

Dying, stunted, yellow to brown horseradish plants.

DISEASE: Brittle root

HOST: Horseradish

Close-up of stunted, yellow horseradish plants.

DISEASE: Brittle root

HOST: Horseradish

Horseradish with discolored internal tissues. Healthy root segment (top right).

DISEASE: Pink disease

HOST: Pineapple

Infected pineapple slices; effect of heating (right) and not heating (left).

DISEASE: Pink disease

HOST: Pineapple

Two clones (A and D) showing different stages of infection. Second and fourth fruits (left to right) have been heated. Disease originally attributed to Gluconobacter oxydans and Enterobacter agglomerans and later to Pantoea citrea.