RESULTS

(7)

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DISEASE: Drippy nut disease

HOST: Oak

Ooze from young twig inoculated with Brenneria quercina.

Drippy nut disease | Oak

DISEASE: Drippy nut disease

HOST: Oak (Quercus agrifolia)

PATHOGEN: Brenneria quercina

PATHOGEN SYNONYM: Erwinia quercina

SOURCE: M. Schroth

DISEASE: Drippy nut disease

HOST: Oak

Ooze from infected acorn. Copious ooze drips from infected acorns, leaving sticky spots on objects under tree canopy. Infections are associated with insect oviposit wounds.

Drippy nut disease | Oak

DISEASE: Drippy nut disease

HOST: Oak (Quercus agrifolia)

PATHOGEN: Brenneria quercina

PATHOGEN SYNONYM: Erwinia quercina

SOURCE: M. Schroth

DISEASE: Phony disease (Phony peach)

HOST: Peach

Tree with characteristic reduced growth. Foliage is dark green, then turns yellowish. Twigs become brittle and branches die back. Fruit are small.

Phony disease (Phony peach) | Peach

DISEASE: Phony disease (Phony peach)

HOST: Peach (Prunus persica)

PATHOGEN: Xylella fastidiosa

SOURCE: P. C. Anderson

DISEASE: Phony disease (Phony peach)

HOST: Peach

Twigs on diseased trees have shortened internodes and increased lateral branching.

Phony disease (Phony peach) | Peach

DISEASE: Phony disease (Phony peach)

HOST: Peach (Prunus persica)

PATHOGEN: Xylella fastidiosa

SOURCE: M. Davis

DISEASE: Shallow bark canker

HOST: Walnut

Diseased, discolored tissues revealed by removing external bark.

Shallow bark canker | Walnut

DISEASE: Shallow bark canker

HOST: Walnut (Juglans regia 'Hartley')

PATHOGEN: Brenneria nigrifluens

PATHOGEN SYNONYM: Erwinia nigrifluens

SOURCE: B. Teviotdale

DISEASE: Shallow bark canker

HOST: Walnut

Trunk with brown exudate shallow cankers.

Shallow bark canker | Walnut

DISEASE: Shallow bark canker

HOST: Walnut (Juglans regia 'Hartley')

PATHOGEN: Brenneria nigrifluens

PATHOGEN SYNONYM: Erwinia nigrifluens

SOURCE: B. Teviotdale

DISEASE: Shallow bark canker

HOST: Walnut

Multiple cankers with brown exudate. Cankers on trunk are shallow.

Shallow bark canker | Walnut

DISEASE: Shallow bark canker

HOST: Walnut (Juglans regia 'Hartley')

PATHOGEN: Brenneria nigrifluens

PATHOGEN SYNONYM: Erwinia nigrifluens

SOURCE: B. Teviotdale