RESULTS

(6)

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DISEASE: Aster yellows

HOST: Aster

Foliar symptoms of chlorosis, malformation of leaves, and phyllody.

Aster yellows | Aster

DISEASE: Aster yellows

HOST: Aster (Aster sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: R. McCoy, M. Davis

DISEASE: Aster yellows

HOST: Aster

Flowers with phyllody (left and center). Healthy flower (right).

Aster yellows | Aster

DISEASE: Aster yellows

HOST: Aster (Aster sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: R. McCoy, M. Davis

DISEASE: Aster yellows

HOST: Aster

Macrosteles sp., a leafhopper vector of aster yellows phytoplasma.

Aster yellows | Aster

DISEASE: Aster yellows

HOST: Aster (Aster sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: J. Clark, A. Purcell, M. Davis

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: Bacterial dieback of nectarine

HOST: Nectarine

Fruit lesions is another symptom of this disease.

Bacterial dieback of nectarine | Nectarine

DISEASE: Bacterial dieback of nectarine

HOST: Nectarine (Prunus persica var. nucipersica 'Redgold')

PATHOGEN: Pseudomonas syringae pv. persicae

SOURCE: J. Young

DISEASE: Bacterial spot

HOST: Nectarine

Nectarine with necrotic spots on leaves and dark necrotic spots on fruit.

Bacterial spot | Nectarine

DISEASE: Bacterial spot

HOST: Nectarine (Prunus persica var. nucipersica 'Redgold')

PATHOGEN: Xanthomonas arboricola pv. pruni

PATHOGEN SYNONYM: Xanthomonas campestris pv. pruni

SOURCE: J. Young