RESULTS

(5)

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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: Elm leaf scorch

HOST: Elm

Diseased tree with scorch at leaf margins.

Elm leaf scorch | Elm

DISEASE: Elm leaf scorch

HOST: Elm (Ulmus americana)

PATHOGEN: Xylella fastidiosa

SOURCE: J. Sherald, M. Shurtleff

DISEASE: Elm leaf scorch

HOST: Elm

Severely diseased tree with dieback and scorched leaves.

Elm leaf scorch | Elm

DISEASE: Elm leaf scorch

HOST: Elm (Ulmus americana)

PATHOGEN: Xylella fastidiosa

SOURCE: W. Sinclair

DISEASE: Red stripe (Top rot)

HOST: Sugarcane

Symptoms of disease are long, narrow, and sharply delineated red stripes. Top rot, another stage, may occur with or without red stripes.

Red stripe (Top rot) | Sugarcane

DISEASE: Red stripe (Top rot)

HOST: Sugarcane (Saccharum officinarum)

PATHOGEN: Acidovorax avenae

PATHOGEN SYNONYM: Acidovorax avenae subsp. avenae

SOURCE: APS