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RESULTS

(11)

DISEASE: Bacterial decline

HOST: Papaya

Bacterial decline of papaya, historically called St. Croix decline, was thought to be caused by a fungus. This picture shows a papaya with dead top and side branches, a severe stage of the disease.

DISEASE: Bacterial decline

HOST: Papaya

Water-soaked papaya stem in St. Croix. Dark, water-soaked, greasy lesions occur on stems and leaves. The causal agent differs somewhat from descriptions of Erwinia papayae D strains in Micronesia.

DISEASE: Bacterial decline

HOST: Papaya

Bacterial invasion of leaf veins and adjacent tissues of papaya in Micronesia. This disease has also been called canker, dieback, and blight.

DISEASE: Bacterial decline

HOST: Papaya

Complete destruction of papaya plantation in Micronesia. Only a severely damaged trunk remains.

DISEASE: Bacterial leaf spot

HOST: Alfalfa

Stems with necrotic lesions.

DISEASE: Bacterial leaf spot

HOST: Alfalfa

Leaves with brown necrotic spots. Stems have water-soaked spots.

DISEASE: Bacterial leaf spot

HOST: Alfalfa

Leaves with both water-soaked and necrotic spots.

DISEASE: Bacterial leaf spot

HOST: Alfalfa

Leaves with necrotic, brownish paperlike areas.

DISEASE: Drippy gill

HOST: Mushroom

Drippy gill is characterized by small dark spots on gills with drops of bacterial ooze at the centers. Severe infection results in slimy areas and collapse of gills.