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RESULTS

(7)

DISEASE: Almond leaf scorch

HOST: Almond

Light brown necrotic (scorched) areas on curling leaves.

DISEASE: Almond leaf scorch

HOST: Almond

Dying almond trees with scorched appearance. Initial symptoms are marginal chlorosis, usually late in the year. Scorch often is first noted at leaf tips, symptoms worsen, and terminal branches may die.

DISEASE: Pseudomonas leaf spot

HOST: Marigold

Marigolds with yellow apical chlorosis attributed to toxin production by the pathogen.

DISEASE: Pseudomonas leaf spot

HOST: Marigold

Chlorotic leaves with total loss of chlorophyll. Disease is also known as toxic chlorosis.

DISEASE: Pseudomonas leaf spot

HOST: Marigold

Plants with bright yellow apical chlorosis.

DISEASE: Pseudomonas leaf spot

HOST: Primrose

Leaf with brownish red spots and reddening of adjacent areas. Disease begins as small, water-soaked lesions that later coalesce into large necrotic spots.

DISEASE: Wildfire (Angular leaf spot)

HOST: Tobacco

Characteristic symptoms are necrotic, brown spots with angular margins surrounded by distinct yellow halos. The halos are caused by the production of tabtoxin.