RESULTS

(6)

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DISEASE: Ash yellows

HOST: Ash

Forest of declining trees, some chlorotic and others with dieback.

Ash yellows | Ash

DISEASE: Ash yellows

HOST: Ash (Fraxinus americana)

PATHOGEN: 'Candidatus Phytoplasma fraxini'

PATHOGEN SYNONYM: Phytoplasma Ash yellows group

SOURCE: W. Sinclair

DISEASE: Ash yellows

HOST: Ash

White ash with deliquescent branching.

Ash yellows | Ash

DISEASE: Ash yellows

HOST: Ash (Fraxinus americana)

PATHOGEN: 'Candidatus Phytoplasma fraxini'

PATHOGEN SYNONYM: Phytoplasma Ash yellows group

SOURCE: W. Sinclair

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: Grass

Initial symptom is a lime-green, yellow, or blue-green appearance of the grass. The next symptom is small, reddish brown spots on leaf blades.

Bacterial wilt | Grass

DISEASE: Bacterial wilt

HOST: Grass (Poa annua)

PATHOGEN: Xanthomonas translucens pv. poae

SOURCE: P. H. Dernoeden

DISEASE: Bacterial wilt

HOST: Grass

Infected turf grass with patches of yellowing, wilted, and dead grass.

Bacterial wilt | Grass

DISEASE: Bacterial wilt

HOST: Grass (Poa annua)

PATHOGEN: Xanthomonas translucens pv. poae

SOURCE: APS

DISEASE: Bacterial wilt

HOST: Grass

Late stage of disease development. Dead grass has a light brown or bleached tan appearance.

Bacterial wilt | Grass

DISEASE: Bacterial wilt

HOST: Grass (Poa annua)

PATHOGEN: Xanthomonas translucens pv. poae

SOURCE: P. H. Dernoeden