RESULTS

(3)

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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: Bois noir disease

HOST: Grape

Infected plant with typical symptoms of rolling, triangular-trapezoid-shaped leaves with desiccated appearance.

Bois noir disease | Grape

DISEASE: Bois noir disease

HOST: Grape (Vitis vinifera 'Pinot Noir')

PATHOGEN: 'Candidatus Phytoplasma solani'

PATHOGEN SYNONYM: Phytoplasma Stolbur group

SOURCE: W. Schweigkofler

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry

X-disease causes undersized, yellowish fruit. Diseased branches turn rusty red near end of season. Some defoliation occurs on diseased branches.

X-disease (Western X) or buckskin | Cherry

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry (Prunus cerasus)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: A. Jones