RESULTS

(7)

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DISEASE: Carrot yellows

HOST: Carrot

Flowers with shoot proliferation (witches’-broom) (left). Healthy flower (right). Virescence and phyllody of flower parts are common.

Carrot yellows | Carrot

DISEASE: Carrot yellows

HOST: Carrot (Daucus carota)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: M. Schroth

DISEASE: Carrot yellows

HOST: Carrot

Carrot with proliferation of roots. Initial symptoms include yellowing and narrowing of veins of young leaves. The entire leaf later becomes necrotic.

Carrot yellows | Carrot

DISEASE: Carrot yellows

HOST: Carrot (Daucus carota)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: G. S. Abawi

DISEASE: Strawberry lethal decline

HOST: Strawberry

Diseased plant with bronzing of older leaves and upward rolling or cupping of younger leaves. Leaves are chlorotic on upper surfaces and reddish or purplish on lower surfaces. In time, the entire plant dies.

Strawberry lethal decline | Strawberry

DISEASE: Strawberry lethal decline

HOST: Strawberry (Fragaria × ananassa)

PATHOGEN: 'Candidatus Phytoplasma' sp.

PATHOGEN SYNONYM: Phytoplasma (undefined)

SOURCE: H. Schwartz

DISEASE: X-disease (Eastern X)

HOST: Chokecherry

Shot-hole stage of X-disease.

X-disease (Eastern X) | Chokecherry

DISEASE: X-disease (Eastern X)

HOST: Chokecherry (Prunus virginiana)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: W. Sinclair

DISEASE: X-disease (Eastern X)

HOST: Chokecherry

X-disease causes rosettes and premature loss of leaves.

X-disease (Eastern X) | Chokecherry

DISEASE: X-disease (Eastern X)

HOST: Chokecherry (Prunus virginiana)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: W. Sinclair

DISEASE: X-disease (Eastern X)

HOST: Chokecherry

Chokecherry with stunted shoots, red leaves, and rosettes.

X-disease (Eastern X) | Chokecherry

DISEASE: X-disease (Eastern X)

HOST: Chokecherry (Prunus virginiana)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: W. Sinclair

DISEASE: X-disease (Eastern X)

HOST: Chokecherry

Chokecherry with red leaves, rosettes, and bud loss.

X-disease (Eastern X) | Chokecherry

DISEASE: X-disease (Eastern X)

HOST: Chokecherry (Prunus virginiana)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: W. Sinclair