RESULTS

(4)

FILTER

DISEASE: Greasy center

HOST: Poinsettia

Stem with dark cankers and copious ooze. Necrotic areas are greasy in appearance and eventually turn light tan to brown with a papery texture as the cuticle becomes detached.

Greasy center | Poinsettia

DISEASE: Greasy center

HOST: Poinsettia (Euphorbia pulcherrima)

PATHOGEN: Pseudomonas viridiflava

SOURCE: R. Raabe

DISEASE: Green petal disease

HOST: Strawberry

Diseased plant with button berries and green petals that turn red. The disease is caused by a subgroup of aster yellows.

Green petal disease | Strawberry

DISEASE: Green petal disease

HOST: Strawberry (Fragaria × ananassa)

PATHOGEN: 'Candidatus Phytoplasma' sp.

PATHOGEN SYNONYM: Phytoplasma (undefined)

SOURCE: M. Clark

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