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DISEASE: Bacterial canker and blast

HOST: Apricot

Apricot with typical reddish brown-discolored tissues beneath the bark and gumming around infected areas.

Bacterial canker and blast | Apricot

DISEASE: Bacterial canker and blast

HOST: Apricot (Prunus armeniaca)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: S. Sampson, M. Shurtleff

DISEASE: Bacterial canker and blast

HOST: Apricot

Young infected twig with droplets of bacterial ooze on stem.

Bacterial canker and blast | Apricot

DISEASE: Bacterial canker and blast

HOST: Apricot (Prunus armeniaca 'Moorpark')

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: J. Young

DISEASE: Bacterial canker and blast

HOST: Apricot

Bacterial canker has many symptoms. Typical symptoms are brown, sometimes reddish brown, internal tissues and rough, cracked bark.

Bacterial canker and blast | Apricot

DISEASE: Bacterial canker and blast

HOST: Apricot (Prunus armeniaca 'Moorpark')

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: J. Young

DISEASE: Bacterial canker and blast

HOST: Apricot

Infected apricot with sparse foliage (some twigs with no foliage) and a discolored area exposed where bark was removed.

Bacterial canker and blast | Apricot

DISEASE: Bacterial canker and blast

HOST: Apricot (Prunus armeniaca 'Moorpark')

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: J. Young

DISEASE: Bacterial canker and blast

HOST: Apricot

Fruit spot phase with numerous reddish necrotic spots.

Bacterial canker and blast | Apricot

DISEASE: Bacterial canker and blast

HOST: Apricot (Prunus armeniaca 'Moorpark')

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: J. Young

DISEASE: Sweet potato little leaf

HOST: Sweet potato

Infected plant (left) and healthy plant (right).

Sweet potato little leaf | Sweet potato

DISEASE: Sweet potato little leaf

HOST: Sweet potato (Ipomoea batatas)

PATHOGEN: 'Candidatus Phytoplasma aurantifolia'

PATHOGEN SYNONYM: Phytoplasma Peanut witches'-broom group

SOURCE: R. McCoy, M. Davis

DISEASE: X-disease (Peach yellow leaf roll)

HOST: Peach

Peach twig with yellow, curled (rolled) leaves.

X-disease (Peach yellow leaf roll) | Peach

DISEASE: X-disease (Peach yellow leaf roll)

HOST: Peach (Prunus persica)

PATHOGEN: 'Candidatus Phytoplasma mali'

PATHOGEN SYNONYM: Phytoplasma Apple proliferation group

SOURCE: W. Sinclair