RESULTS

(5)

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DISEASE: Bacterial fasciation (Leafy gall)

HOST: Begonia

Leafy gall on stem.

Bacterial fasciation (Leafy gall) | Begonia

DISEASE: Bacterial fasciation (Leafy gall)

HOST: Begonia (Begonia sp.)

PATHOGEN: Rhodococcus fascians

SOURCE: M. Geesteranus, J. van der Wolf

DISEASE: Bacterial leaf spot (Blight)

HOST: Begonia

Initial symptoms appear as small, blisterlike lesions. As lesions age, they enlarge, producing broad patches of necrotic leaf tissue.

Bacterial leaf spot (Blight) | Begonia

DISEASE: Bacterial leaf spot (Blight)

HOST: Begonia (Begonia sp.)

PATHOGEN: Xanthomonas axonopodis pv. begoniae

PATHOGEN SYNONYM: Xanthomonas campestris pv. begoniae

SOURCE: APS

DISEASE: Bacterial leaf spot (Blight)

HOST: Begonia

Advanced stage of disease with dark, large necrotic areas on leaves and interveinal chlorosis.

Bacterial leaf spot (Blight) | Begonia

DISEASE: Bacterial leaf spot (Blight)

HOST: Begonia (Begonia sp.)

PATHOGEN: Xanthomonas axonopodis pv. begoniae

PATHOGEN SYNONYM: Xanthomonas campestris pv. begoniae

SOURCE: APS

DISEASE: Elm yellows

HOST: Elm

Elm yellows is characterized by witches'-brooms and stunting. Some cultivars have both yellow and reddish foliar discoloration.

Elm yellows | Elm

DISEASE: Elm yellows

HOST: Elm (Ulmus parvifolia)

PATHOGEN: 'Candidatus Phytoplasma ulmi'

PATHOGEN SYNONYM: Phytoplasma Elm yellows group

SOURCE: W. Sinclair

DISEASE: Pseudomonas leaf spot

HOST: Primrose

Leaf with brownish red spots and reddening of adjacent areas. Disease begins as small, water-soaked lesions that later coalesce into large necrotic spots.

Pseudomonas leaf spot | Primrose

DISEASE: Pseudomonas leaf spot

HOST: Primrose (Primula sp.)

PATHOGEN: Pseudomonas syringae pv. primulae

SOURCE: APS