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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: Goss's bacterial wilt and blight

HOST: Corn (Maize)

Wilted, dying plants. Leaves have gray to light yellow stripes and irregular margins that follow leaf veins. Systemically infected plants usually have orange vascular bundles.

Goss's bacterial wilt and blight | Corn (Maize)

DISEASE: Goss's bacterial wilt and blight

HOST: Corn (Maize) (Zea mays)

PATHOGEN: Clavibacter michiganensis subsp. nebraskensis

PATHOGEN SYNONYM: Corynebacterium nebraskense

SOURCE: A. Vidaver

DISEASE: Goss's bacterial wilt and blight

HOST: Corn (Maize)

The disease causes necrotic leaf lesions, which typically have dark flecks (freckles) within the lesions (not seen here).

Goss's bacterial wilt and blight | Corn (Maize)

DISEASE: Goss's bacterial wilt and blight

HOST: Corn (Maize) (Zea mays)

PATHOGEN: Clavibacter michiganensis subsp. nebraskensis

PATHOGEN SYNONYM: Corynebacterium nebraskense

SOURCE: A. Vidaver

DISEASE: Sugarcane dwarf (White leaf)

HOST: Sugarcane

Unknown phytoplasma causes sugarcane leaves to become white.

Sugarcane dwarf (White leaf) | Sugarcane

DISEASE: Sugarcane dwarf (White leaf)

HOST: Sugarcane (Saccharum officinarum)

PATHOGEN: 'Candidatus Phytoplasma' sp.

PATHOGEN SYNONYM: Phytoplasma (undefined)

SOURCE: A. Alvarez