RESULTS

(10)

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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 blight (Boll rot)

HOST: Cotton

Boll rot first appears as raised, water-soaked lesions, which become sunken and turn brown to black with time.

Bacterial blight (Boll rot) | Cotton

DISEASE: Bacterial blight (Boll rot)

HOST: Cotton (Gossypium barbadense)

PATHOGEN: Xanthomonas citri subsp. malvacearum

PATHOGEN SYNONYM: Xanthomonas campestris pv. malvacearum

SOURCE: A. Hayward

DISEASE: Bacterial blight (Boll rot)

HOST: Cotton

Infection of bolls causes premature opening and increased susceptibility to secondary, saprophytic microorganisms that cause rot. Note discolored cotton.

Bacterial blight (Boll rot) | Cotton

DISEASE: Bacterial blight (Boll rot)

HOST: Cotton (Gossypium barbadense)

PATHOGEN: Xanthomonas citri subsp. malvacearum

PATHOGEN SYNONYM: Xanthomonas campestris pv. malvacearum

SOURCE: APS

DISEASE: Bacterial brown spot

HOST: Bean

Bean with water-soaked and necrotic lesions on pods and leaves.

Bacterial brown spot | Bean

DISEASE: Bacterial brown spot

HOST: Bean (Phaseolus vulgaris)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: H. Schwartz

DISEASE: Bacterial brown spot

HOST: Bean

Common bean with necrotic lesions on upper and lower surfaces of leaves. Lesions often are surrounded by bright yellow zones (not shown).

Bacterial brown spot | Bean

DISEASE: Bacterial brown spot

HOST: Bean (Phaseolus vulgaris)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: H. Schwartz

DISEASE: Bacterial brown spot

HOST: Bean

Leaves of common bean with shot-holes, a late stage of disease.

Bacterial brown spot | Bean

DISEASE: Bacterial brown spot

HOST: Bean (Phaseolus vulgaris)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: H. Schwartz

DISEASE: Bacterial brown spot

HOST: Bean

Leaves of dwarf bean exhibiting late stage of disease.

Bacterial brown spot | Bean

DISEASE: Bacterial brown spot

HOST: Bean (Phaseolus vulgaris)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: J. Young

DISEASE: Bacterial brown spot

HOST: Mallotus

Leaf with small, rustylike lesions.

Bacterial brown spot | Mallotus

DISEASE: Bacterial brown spot

HOST: Mallotus (Mallotus japonicus)

PATHOGEN: Xanthomonas campestris pv. malloti

SOURCE: M. Goto