RESULTS

(8)

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DISEASE: Citrus stubborn disease

HOST: Citrus (sp. unknown)

Characteristic symptoms of thickened peel at peduncle end and aborted seeds.

Citrus stubborn disease | Citrus (sp. unknown)

DISEASE: Citrus stubborn disease

HOST: Citrus (sp. unknown) (Citrus sp.)

PATHOGEN: Spiroplasma citri

SOURCE: APS

DISEASE: Citrus stubborn disease

HOST: Citrus (Orange)

Severely stunted sweet orange tree. Foliage is dense and abnormally upright. Leaves may be cupped and unusually thick. They also may be chlorotic and mottled.

Citrus stubborn disease | Citrus (Orange)

DISEASE: Citrus stubborn disease

HOST: Citrus (Orange) (Citrus sinensis)

PATHOGEN: Spiroplasma citri

SOURCE: S. M. Garnsey

DISEASE: Citrus stubborn disease

HOST: Citrus (Orange)

Fruit from a diseased tree are frequently lopsided or acorn-shaped, usually few and small. They may not color at stem end.

Citrus stubborn disease | Citrus (Orange)

DISEASE: Citrus stubborn disease

HOST: Citrus (Orange) (Citrus sinensis)

PATHOGEN: Spiroplasma citri

SOURCE: J. M. Bove, M. Garnier

DISEASE: Citrus stubborn disease

HOST: Citrus (Orange)

Sweet orange exhibiting off-season flowering and crop heterogeneity. Diseased trees generally have shoots with shortened internodes, which lead to rosettes with cupped leaves.

Citrus stubborn disease | Citrus (Orange)

DISEASE: Citrus stubborn disease

HOST: Citrus (Orange) (Citrus sinensis)

PATHOGEN: Spiroplasma citri

SOURCE: J. M. Bove, M. Garnier

DISEASE: Phony disease (Phony peach)

HOST: Peach

Tree with characteristic reduced growth. Foliage is dark green, then turns yellowish. Twigs become brittle and branches die back. Fruit are small.

Phony disease (Phony peach) | Peach

DISEASE: Phony disease (Phony peach)

HOST: Peach (Prunus persica)

PATHOGEN: Xylella fastidiosa

SOURCE: P. C. Anderson

DISEASE: Phony disease (Phony peach)

HOST: Peach

Twigs on diseased trees have shortened internodes and increased lateral branching.

Phony disease (Phony peach) | Peach

DISEASE: Phony disease (Phony peach)

HOST: Peach (Prunus persica)

PATHOGEN: Xylella fastidiosa

SOURCE: M. Davis

DISEASE: Wildfire

HOST: Soybean

Close-up of lesions with large, yellow halos.

Wildfire | Soybean

DISEASE: Wildfire

HOST: Soybean (Glycine max)

PATHOGEN: Pseudomonas syringae pv. tabaci

SOURCE: J. Forsberg, M. Shurtleff

DISEASE: Wildfire

HOST: Soybean

Leaf with brown necrotic spots with yellow halos. During dry weather, lesions become dry and dead areas tear off, leaving a tattered appearance.

Wildfire | Soybean

DISEASE: Wildfire

HOST: Soybean (Glycine max)

PATHOGEN: Pseudomonas syringae pv. tabaci

SOURCE: D. Teakle