RESULTS

(7)

FILTER

DISEASE: Deep bark canker

HOST: Walnut

Reddish brown exudate flowing from longitudinal cracks in the trunk. Cankers are deep extending into wood.

Deep bark canker | Walnut

DISEASE: Deep bark canker

HOST: Walnut (Juglans regia 'Hartley')

PATHOGEN: Brenneria rubrifaciens

PATHOGEN SYNONYM: Erwinia rubrifaciens

SOURCE: B. Teviotdale

DISEASE: Deep bark canker

HOST: Walnut

Reddish brown exudate flowing from cracks in trunk, a result of systemic invasion by the bacterium.

Deep bark canker | Walnut

DISEASE: Deep bark canker

HOST: Walnut (Juglans regia 'Hartley')

PATHOGEN: Brenneria rubrifaciens

PATHOGEN SYNONYM: Erwinia rubrifaciens

SOURCE: B. Teviotdale

DISEASE: Deep bark canker

HOST: Walnut

Pits in the wood and black streaks in inner bark are key diagnostic symptoms.

Deep bark canker | Walnut

DISEASE: Deep bark canker

HOST: Walnut (Juglans regia)

PATHOGEN: Brenneria rubrifaciens

PATHOGEN SYNONYM: Erwinia rubrifaciens

SOURCE: N. Schaad, M. Schroth

DISEASE: Deep bark canker

HOST: Walnut

Removal of bark revealed pitted vascular tissues.

Deep bark canker | Walnut

DISEASE: Deep bark canker

HOST: Walnut (Juglans regia 'Hartley')

PATHOGEN: Brenneria rubrifaciens

PATHOGEN SYNONYM: Erwinia rubrifaciens

SOURCE: N. Schaad

DISEASE: Deep bark canker

HOST: Walnut

Dead limbs are characteristic of advanced stage of disease.

Deep bark canker | Walnut

DISEASE: Deep bark canker

HOST: Walnut (Juglans regia 'Hartley')

PATHOGEN: Brenneria rubrifaciens

PATHOGEN SYNONYM: Erwinia rubrifaciens

SOURCE: N. Schaad

DISEASE: Fasciation (Shoot proliferation)

HOST: Heron's bill (Stork's bill)

Heron's bill with multiple shoots.

Fasciation (Shoot proliferation) | Heron's bill (Stork's bill)

DISEASE: Fasciation (Shoot proliferation)

HOST: Heron's bill (Stork's bill) (Erodium × variabile)

PATHOGEN: Rhodococcus fascians

SOURCE: M. Putnam

DISEASE: Western wetwood

HOST: Elm

Spokelike, discolored extensions that expanded into sapwood, following an injection with a fungicide. The causal agent is not known but symptoms are associated with bacteria and yeast.

Western wetwood | Elm

DISEASE: Western wetwood

HOST: Elm (Ulmus americana)

PATHOGEN: Causal agent unknown

SOURCE: W. Sinclair