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DISEASE: Bacterial stem and root rot

HOST: Sweet potato

Collapse of stems and roots caused by systemic activity of the pathogen.

Bacterial stem and root rot | Sweet potato

DISEASE: Bacterial stem and root rot

HOST: Sweet potato (Ipomoea batatas)

PATHOGEN: Dickeya sp.

PATHOGEN SYNONYM: Erwinia chrysanthemi

SOURCE: N. Schaad

DISEASE: Bacterial stem and root rot

HOST: Sweet potato

Rot and collapse of stem, petioles, and leaves caused by systemic infection.

Bacterial stem and root rot | Sweet potato

DISEASE: Bacterial stem and root rot

HOST: Sweet potato (Ipomoea batatas)

PATHOGEN: Dickeya sp.

PATHOGEN SYNONYM: Erwinia chrysanthemi

SOURCE: N. Schaad

DISEASE: Bacterial stem and root rot

HOST: Sweet potato

Rot and internal discoloration of tuber.

Bacterial stem and root rot | Sweet potato

DISEASE: Bacterial stem and root rot

HOST: Sweet potato (Ipomoea batatas)

PATHOGEN: Dickeya sp.

PATHOGEN SYNONYM: Erwinia chrysanthemi

SOURCE: C. Clark

DISEASE: Dogwood stunt

HOST: Dogwood

Diseased plant with small leaves (left).

Dogwood stunt | Dogwood

DISEASE: Dogwood stunt

HOST: Dogwood (Cornus sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: W. Sinclair

DISEASE: European stone fruit yellows

HOST: Almond

The disease causes yellowing and rolling of leaves (right). Leaves become thick and rough in texture. Healthy leaves (left).

European stone fruit yellows | Almond

DISEASE: European stone fruit yellows

HOST: Almond (Prunus dulcis)

PATHOGEN: 'Candidatus Phytoplasma prunorum'

PATHOGEN SYNONYM: Phytoplasma Apple proliferation group

SOURCE: E. Seemueller