RESULTS

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FILTER

DISEASE: Bacterial leaf spot

HOST: Collard

Leaf with several kinds of spots. Small necrotic lesions with yellow halos, brown lesions, and large, brown necrotic areas caused by coalescing of lesions.

Bacterial leaf spot | Collard

DISEASE: Bacterial leaf spot

HOST: Collard (Brassica oleracea var. acephala)

PATHOGEN: Pseudomonas syringae pv. maculicola

SOURCE: S. Miller

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: Halo blight

HOST: Bean

Leaf of 'Bountiful' bean with chlorotic halos, an early stage of disease. Tiny water-soaked are difficult to see.

Halo blight | Bean

DISEASE: Halo blight

HOST: Bean (Phaseolus vulgaris 'Bountiful')

PATHOGEN: Pseudomonas syringae pv. phaseolicola

PATHOGEN SYNONYM: Pseudomonas savastanoi pv. phaseolicola

SOURCE: M. Schroth