RESULTS

(7)

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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.

Bacterial decline | Papaya

DISEASE: Bacterial decline

HOST: Papaya (Carica papaya)

PATHOGEN: Erwinia papayae

SOURCE: M. Schroth

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.

Bacterial decline | Papaya

DISEASE: Bacterial decline

HOST: Papaya (Carica papaya)

PATHOGEN: Erwinia papayae

SOURCE: M. Schroth

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.

Bacterial decline | Papaya

DISEASE: Bacterial decline

HOST: Papaya (Carica papaya)

PATHOGEN: Erwinia papayae

SOURCE: E. Trujillo

DISEASE: Bacterial decline

HOST: Papaya

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

Bacterial decline | Papaya

DISEASE: Bacterial decline

HOST: Papaya (Carica papaya)

PATHOGEN: Erwinia papayae

SOURCE: E. Trujillo

DISEASE: Bacterial fasciation (Shoot proliferation)

HOST: Campanula

Overproduction of new shoots and short, thickened, distorted stems.

Bacterial fasciation (Shoot proliferation) | Campanula

DISEASE: Bacterial fasciation (Shoot proliferation)

HOST: Campanula (Campanula sp.)

PATHOGEN: Rhodococcus fascians

SOURCE: M. Putnam

DISEASE: Bacterial fasciation (Shoot proliferation)

HOST: Candytuft

The disease causes production of multiple shoots.

Bacterial fasciation (Shoot proliferation) | Candytuft

DISEASE: Bacterial fasciation (Shoot proliferation)

HOST: Candytuft (Iberis sp.)

PATHOGEN: Rhodococcus fascians

SOURCE: M. Putnam

DISEASE: Western wetwood

HOST: Elm

Spokelike, discolored extensions that expanded into sapwood, following an injection with a fungicide. The causal agent is not known but symptoms are associated with bacteria and yeast.

Western wetwood | Elm

DISEASE: Western wetwood

HOST: Elm (Ulmus americana)

PATHOGEN: Causal agent unknown

SOURCE: W. Sinclair