RESULTS

(8)

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DISEASE: Bacterial leaf spot

HOST: Pumpkin

Leaf with tan to brown, angular lesions with dark margins. They are similar to those caused by angular leaf spot.

Bacterial leaf spot | Pumpkin

DISEASE: Bacterial leaf spot

HOST: Pumpkin (Cucurbita pepo)

PATHOGEN: Xanthomonas cucurbitae

SOURCE: J. Young

DISEASE: Bacterial wilt

HOST: Cantaloupe

Cantaloupe field with severe destruction from bacterial wilt (left), less on right.

Bacterial wilt | Cantaloupe

DISEASE: Bacterial wilt

HOST: Cantaloupe (Cucumis melo var. cantalupensis)

PATHOGEN: Erwinia tracheiphila

SOURCE: L. Claflin

DISEASE: Bacterial wilt

HOST: Muskmelon

Severely diseased plants as noted by dying runners.

Bacterial wilt | Muskmelon

DISEASE: Bacterial wilt

HOST: Muskmelon (Cucumis melo)

PATHOGEN: Erwinia tracheiphila

SOURCE: M. Shurtleff

DISEASE: Bacterial wilt

HOST: Muskmelon

Wilt-devastated muskmelon field.

Bacterial wilt | Muskmelon

DISEASE: Bacterial wilt

HOST: Muskmelon (Cucumis melo)

PATHOGEN: Erwinia tracheiphila

SOURCE: M. Shurtleff

DISEASE: Bacterial wilt

HOST: Squash

Field with severe symptoms of wilt. Foliage often is chlorotic and leaf margins may be chlorotic and necrotic before plant death. Bacterial ooze may be seen streaming from the xylem when infected stems are cut.

Bacterial wilt | Squash

DISEASE: Bacterial wilt

HOST: Squash (Cucurbita maxima)

PATHOGEN: Erwinia tracheiphila

SOURCE: B. Jacobsen, M. Shurtleff

DISEASE: Center rot

HOST: Onion

Early symptoms of disease are necrotic, bleached areas on young leaves that typically wilt.

Center rot | Onion

DISEASE: Center rot

HOST: Onion (Allium cepa)

PATHOGEN: Pantoea ananatis

SOURCE: R. Gitaitis

DISEASE: Center rot

HOST: Onion

Advanced stage of center rot. The bacterium has moved down from leaves into the bulb.

Center rot | Onion

DISEASE: Center rot

HOST: Onion (Allium cepa)

PATHOGEN: Pantoea ananatis

SOURCE: H. Schwartz

DISEASE: Center rot

HOST: Onion

Bulb with pale yellow, discolored decayed area.

Center rot | Onion

DISEASE: Center rot

HOST: Onion (Allium cepa)

PATHOGEN: Pantoea ananatis

SOURCE: H. Schwartz