RESULTS

(6)

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DISEASE: Bacterial blast and black pit

HOST: Citrus (Lemon)

The term "black pit" refers to black lesions on fruit, which may be specks or large, sunken pits as seen here. They also may be light tan, later becoming reddish brown to black.

Bacterial blast and black pit | Citrus (Lemon)

DISEASE: Bacterial blast and black pit

HOST: Citrus (Lemon) (Citrus limon)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: J. Menge

DISEASE: Bacterial blast and black pit

HOST: Citrus (Lime)

Characteristic symptoms of brownish black lesions on twigs and leaves (blast), starting with infection of petioles. Black pit refers to brown to black sunken spots on fruit, 5 to 20 mm in diameter.

Bacterial blast and black pit | Citrus (Lime)

DISEASE: Bacterial blast and black pit

HOST: Citrus (Lime) (Citrus sp.)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: P. Broadbent

DISEASE: Bacterial blast and fruit spot

HOST: Avocado

White bacterial ooze on surface of fruit. Pseudomonas strains that cause canker likely differ from those that infect fruit and leaves.

Bacterial blast and fruit spot | Avocado

DISEASE: Bacterial blast and fruit spot

HOST: Avocado (Persea americana)

PATHOGEN: Pseudomonas syringae

SOURCE: L. Fucikovsky

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