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: Witches'-broom

HOST: Lilac

Small tree with some chlorotic leaves and deliquescent branching.

Witches'-broom | Lilac

DISEASE: Witches'-broom

HOST: Lilac (Syringa × prestoniae)

PATHOGEN: 'Candidatus Phytoplasma fraxini'

PATHOGEN SYNONYM: Phytoplasma Ash yellows group

SOURCE: W. Sinclair

DISEASE: Witches'-broom

HOST: Paulownia (Empress tree)

Witches'-broom of paulownia.

Witches'-broom | Paulownia (Empress tree)

DISEASE: Witches'-broom

HOST: Paulownia (Empress tree) (Paulownia tomentosa)

PATHOGEN: 'Candidatus Phytoplasma' sp.

PATHOGEN SYNONYM: Phytoplasma (undefined)

SOURCE: R. Davis, M. Davis