RESULTS

(6)

FILTER

DISEASE: Brittle root

HOST: Horseradish

Dying, stunted, yellow to brown horseradish plants.

Brittle root | Horseradish

DISEASE: Brittle root

HOST: Horseradish (Armoracia rusticana)

PATHOGEN: Spiroplasma citri

SOURCE: C. Eastman, M. Davis

DISEASE: Brittle root

HOST: Horseradish

Close-up of stunted, yellow horseradish plants.

Brittle root | Horseradish

DISEASE: Brittle root

HOST: Horseradish (Armoracia rusticana)

PATHOGEN: Spiroplasma citri

SOURCE: D. Sherrod

DISEASE: Brittle root

HOST: Horseradish

Horseradish with discolored internal tissues. Healthy root segment (top right).

Brittle root | Horseradish

DISEASE: Brittle root

HOST: Horseradish (Armoracia rusticana)

PATHOGEN: Spiroplasma citri

SOURCE: J. Fletcher, M. Davis

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: Rugose leaf curl

HOST: Clover

Two rugose, distorted white clover leaves and a healthy leaf. Rugose leaf curl is caused by an unidentified phloem-infecting bacterium.

Rugose leaf curl | Clover

DISEASE: Rugose leaf curl

HOST: Clover (Trifolium repens)

PATHOGEN: Phloem-infecting bacterium

SOURCE: D. Teakle