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RESULTS

(9)

DISEASE: Foamy canker

HOST: Almond

White, macerated tissues near cambium region is characteristic of disease. Foam is usually associated with cankers. The disease is suspected to be bacterial but the causal agent has not been identified.

DISEASE: Foamy canker

HOST: Almond

Amber red-colored ooze sliding down the trunk. The causal agent has not been identified.

DISEASE: Foamy canker

HOST: Koa

Foamy canker of koa is associated with bacteria and yeast. The causal agent has not been identified.

DISEASE: Foamy canker

HOST: Koa

Dieback of koa tree. The causal agent has not been identified.

DISEASE: Oleander leaf scorch

HOST: Oleander

Diseased plant with scalloped, yellowish leaves. This usually is followed by dieback of twigs and branches. Plants often die 2 years after infection.

DISEASE: Oleander leaf scorch

HOST: Oleander

Oleander with symptoms of severe scorch.

DISEASE: Oleander leaf scorch

HOST: Oleander

Oleander with scorch symptoms primarily at leaf tips, an early stage of disease.

DISEASE: Varnish spot

HOST: Lettuce

Leaf with large brown and small, shiny, dark brown necrotic spots that spread in size and later dry out.

DISEASE: Varnish spot

HOST: Lettuce

Advanced stage of disease with large, brown necrotic areas. They most often are along veins. Outermost leaves of the head usually are not affected.