RESULTS

(5)

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: Periwinkle wilt

HOST: Periwinkle

Infected plants with stunting and sparse foliage (center and right).

Periwinkle wilt | Periwinkle

DISEASE: Periwinkle wilt

HOST: Periwinkle (Vinca sp.)

PATHOGEN: Xylella fastidiosa

SOURCE: R. McCoy, M. Davis

DISEASE: Periwinkle wilt

HOST: Periwinkle

Draeculacephala minerva, leafhopper vector of Xylella fastidiosa on plants such as periwinkle and watercress.

Periwinkle wilt | Periwinkle

DISEASE: Periwinkle wilt

HOST: Periwinkle (Vinca sp.)

PATHOGEN: Xylella fastidiosa

SOURCE: J. Clark, A. Purcell, 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