RESULTS

(6)

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 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: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass

Lesions on leaves first appear as water-soaked, translucent, long, narrow streaks. They later turn brown and necrotic and often coalesce into blighted areas.

Black chaff (Bacterial leaf streak) | Wheatgrass

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass (Elytrigia intermedia)

PATHOGEN: Xanthomonas translucens pv. cerealis

SOURCE: S. Mohan

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass

Close-up of leaf with brown necrotic streaks.

Black chaff (Bacterial leaf streak) | Wheatgrass

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass (Elytrigia intermedia)

PATHOGEN: Xanthomonas translucens pv. cerealis

SOURCE: S. Mohan

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