RESULTS

(6)

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DISEASE: Bacterial blight

HOST: Photinia

Symptoms of photinia bud blight shown here are similar to those of blast of pear and apple, caused by Pseudomonas syringae pv. syringae.

Bacterial blight | Photinia

DISEASE: Bacterial blight

HOST: Photinia (Photinia glabra)

PATHOGEN: Pseudomonas syringae pv. photiniae

SOURCE: M. Goto

DISEASE: Bacterial hyperplastic canker

HOST: Almond

Diseased tree with multiple cankers. Margins of cankers are rough, soft, cheesy, dark brown, and have scalloped water-soaked spots that turn brown. Multiple cankers may girdle and kill small twigs.

Bacterial hyperplastic canker | Almond

DISEASE: Bacterial hyperplastic canker

HOST: Almond (Prunus dulcis)

PATHOGEN: Pseudomonas amygdali

SOURCE: P. Psallidas

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