RESULTS

(7)

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DISEASE: Bacterial blast

HOST: Pear

The bacterium infects all flower parts and may spread and kill the entire spur.

Bacterial blast | Pear

DISEASE: Bacterial blast

HOST: Pear (Pyrus communis)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: W. Sinclair

DISEASE: Bacterial leaf spot (Canker)

HOST: Ginkgo

Ginkgo leaf with dark brown, elongated necrotic spots.

Bacterial leaf spot (Canker) | Ginkgo

DISEASE: Bacterial leaf spot (Canker)

HOST: Ginkgo (Ginkgo biloba)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: A. Bishop

DISEASE: Bacterial leaf spot (Canker)

HOST: Ginkgo

Ginkgo with leaf spots and canker on stem.

Bacterial leaf spot (Canker) | Ginkgo

DISEASE: Bacterial leaf spot (Canker)

HOST: Ginkgo (Ginkgo biloba)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: A. Bishop

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry

Comparison of normal, dark cherries (in hand) with infected, immature cherries with less pigmentation.

X-disease (Western X) or buckskin | Cherry

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry (Prunus avium)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: A. Purcell, M. Davis

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry

Healthy cherry shoot (left) and stunted shoot (right).

X-disease (Western X) or buckskin | Cherry

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry (Prunus avium)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: S. Thomson

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry

Infected trees on 'Mazzard' rootstock (right) may live for years, producing fruit with symptoms. Trees on 'Mahaleb' rootstock (left) usually die rapidly in year of infection, about time of fruit ripening.

X-disease (Western X) or buckskin | Cherry

DISEASE: X-disease (Western X) or buckskin

HOST: Cherry (Prunus avium)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: S. Thomson

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