RESULTS

(23)

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DISEASE: Aster yellows

HOST: Watercress

Diseased watercress (left) and healthy plant (right).

Aster yellows | Watercress

DISEASE: Aster yellows

HOST: Watercress (Nasturtium officinale)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: W. Borth

DISEASE: Aster yellows

HOST: Wheat

Healthy head (left) and diseased head (right). Diseased seedlings may die within 2 to 3 weeks. Infected heads of surviving plants are small and sterile, with distorted awns.

Aster yellows | Wheat

DISEASE: Aster yellows

HOST: Wheat (Triticum aestivum)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: L. N. Chiykowski

DISEASE: Aster yellows

HOST: Zinnia

Yellowing and shoot proliferation of foliage.

Aster yellows | Zinnia

DISEASE: Aster yellows

HOST: Zinnia (Zinnia violacea)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: J. Forsberg, M. Shurtleff

DISEASE: Bacterial fasciation (Shoot proliferation)

HOST: Campanula

Overproduction of new shoots and short, thickened, distorted stems.

Bacterial fasciation (Shoot proliferation) | Campanula

DISEASE: Bacterial fasciation (Shoot proliferation)

HOST: Campanula (Campanula sp.)

PATHOGEN: Rhodococcus fascians

SOURCE: M. Putnam

DISEASE: Bacterial fasciation (Shoot proliferation)

HOST: Candytuft

The disease causes production of multiple shoots.

Bacterial fasciation (Shoot proliferation) | Candytuft

DISEASE: Bacterial fasciation (Shoot proliferation)

HOST: Candytuft (Iberis sp.)

PATHOGEN: Rhodococcus fascians

SOURCE: M. Putnam