RESULTS

(5)

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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: Grass

Wilted and dead patches of diseased creeping bent grass (Toronto grass) on golf green.

Bacterial wilt | Grass

DISEASE: Bacterial wilt

HOST: Grass (Agrostis stolonifera)

PATHOGEN: Xanthomonas translucens pv. poae

SOURCE: D. Roberts

DISEASE: Bacterial wilt

HOST: Grass

Irregular disease patterns on golf green. The cultivars Toronto, Cohansey, and Nimisilia are primary hosts of the disease.

Bacterial wilt | Grass

DISEASE: Bacterial wilt

HOST: Grass (Agrostis stolonifera)

PATHOGEN: Xanthomonas translucens pv. poae

SOURCE: D. Roberts