RESULTS

(3)

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DISEASE: Slippery skin

HOST: Onion

Rot progresses from the top of infected scales and eventually internal tissues rot. In early stages, the only external symptoms may be softening of the neck.

Slippery skin | Onion

DISEASE: Slippery skin

HOST: Onion (Allium cepa)

PATHOGEN: Burkholderia gladioli pv. alliicola

PATHOGEN SYNONYM: Pseudomonas gladioli pv. alliicola

SOURCE: H. Schwartz

DISEASE: Sugar beet scab

HOST: Beet

Sugar beets with brownish, erumpent scabs.

Sugar beet scab | Beet

DISEASE: Sugar beet scab

HOST: Beet (Beta vulgaris)

PATHOGEN: Streptomyces scabiei

PATHOGEN SYNONYM: Streptomyces scabies

SOURCE: M. Shurtleff

DISEASE: Western wetwood

HOST: Elm

Spokelike, discolored extensions that expanded into sapwood, following an injection with a fungicide. The causal agent is not known but symptoms are associated with bacteria and yeast.

Western wetwood | Elm

DISEASE: Western wetwood

HOST: Elm (Ulmus americana)

PATHOGEN: Causal agent unknown

SOURCE: W. Sinclair