RESULTS

(8)

FILTER

DISEASE: Aster yellows

HOST: Ranunculus

Malformation of diseased flower.

Aster yellows | Ranunculus

DISEASE: Aster yellows

HOST: Ranunculus (Ranunculus sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: R. Raabe

DISEASE: Aster yellows

HOST: Squash

Diagnostic characteristics for the disease are yellowing of young leaves, proliferation of secondary shoots, and rigid erect habit. Leaves are misshapen and smaller than normal and have stiff, thick laminae.

Aster yellows | Squash

DISEASE: Aster yellows

HOST: Squash (Cucurbita sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: S. Miller

DISEASE: Bacterial leaf spot (Blight)

HOST: Ranunculus

Leaf with large, brown necrotic areas delimited by veins.

Bacterial leaf spot (Blight) | Ranunculus

DISEASE: Bacterial leaf spot (Blight)

HOST: Ranunculus (Ranunculus sp.)

PATHOGEN: Xanthomonas campestris

SOURCE: R. Raabe

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: 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