RESULTS

(7)

FILTER

DISEASE: Bacterial fasciation (Leafy gall)

HOST: Dahlia

Dalhlia tubers with proliferation and leaf development.

Bacterial fasciation (Leafy gall) | Dahlia

DISEASE: Bacterial fasciation (Leafy gall)

HOST: Dahlia (Dahlia sp.)

PATHOGEN: Rhodococcus fascians

SOURCE: M. Shurtleff

DISEASE: Bacterial fasciation (Leafy gall)

HOST: Dahlia

Bacterial fasciation of dahlia tubers.

Bacterial fasciation (Leafy gall) | Dahlia

DISEASE: Bacterial fasciation (Leafy gall)

HOST: Dahlia (Dahlia sp.)

PATHOGEN: Rhodococcus fascians

SOURCE: H. van Hoof, M. Geesteranus

DISEASE: Bacterial leaf spot

HOST: Turnip

Leaf with many tan, dry-appearing, angular spots.

Bacterial leaf spot | Turnip

DISEASE: Bacterial leaf spot

HOST: Turnip (Brassica rapa)

PATHOGEN: Xanthomonas campestris pv. armoraciae

SOURCE: R. Campbell

DISEASE: Bacterial rot

HOST: Dahlia

Longitudinal section of dahlia with discolored, rotted tissues.

Bacterial rot | Dahlia

DISEASE: Bacterial rot

HOST: Dahlia (Dahlia sp.)

PATHOGEN: Dickeya sp.

PATHOGEN SYNONYM: Erwinia chrysanthemi

SOURCE: J. Young

DISEASE: Bacterial soft rot

HOST: Turnip

Rotted root that likely was infected through cracks.

Bacterial soft rot | Turnip

DISEASE: Bacterial soft rot

HOST: Turnip (Brassica rapa)

PATHOGEN: Pectobacterium carotovorum

PATHOGEN SYNONYM: Erwinia carotovora subsp. carotovora

SOURCE: J. Togashi, M. Goto

DISEASE: Bacterial wilt

HOST: Squash

Field with severe symptoms of wilt. Foliage often is chlorotic and leaf margins may be chlorotic and necrotic before plant death. Bacterial ooze may be seen streaming from the xylem when infected stems are cut.

Bacterial wilt | Squash

DISEASE: Bacterial wilt

HOST: Squash (Cucurbita maxima)

PATHOGEN: Erwinia tracheiphila

SOURCE: B. Jacobsen, M. Shurtleff

DISEASE: Crown gall

HOST: Dahlia

Crown gall of dahlia tubers. Note brownish, rough-surfaced galls, one of which shows rot. Galls often are infected by microorganisms that cause rot.

Crown gall | Dahlia

DISEASE: Crown gall

HOST: Dahlia (Dahlia sp.)

PATHOGEN: Agrobacterium tumefaciens

PATHOGEN SYNONYM: Rhizobium sp.

SOURCE: M. Shurtleff