RESULTS

(6)

FILTER

DISEASE: Marginal leaf blight

HOST: Lettuce

Marginal leaf blight first appears as slimy wilting of leaf margins. Small, reddish lesions may be seen on leaf blades. Infected tissues turn brown to black in time.

Marginal leaf blight | Lettuce

DISEASE: Marginal leaf blight

HOST: Lettuce (Lactuca sativa)

PATHOGEN: Pseudomonas marginalis

SOURCE: L. Fucikovsky

DISEASE: Oak leaf scorch

HOST: Oak

Oak with scorched leaf tips.

Oak leaf scorch | Oak

DISEASE: Oak leaf scorch

HOST: Oak (Quercus kelloggii)

PATHOGEN: Xylella fastidiosa

SOURCE: S. Kostka

DISEASE: Oak leaf scorch

HOST: Oak

Leaf with brown, marginal necrosis resembling a burn.

Oak leaf scorch | Oak

DISEASE: Oak leaf scorch

HOST: Oak (Quercus rubra)

PATHOGEN: Xylella fastidiosa

SOURCE: W. Sinclair

DISEASE: Oak leaf scorch

HOST: Oak

Diseased tree with brownish, scorched leaves.

Oak leaf scorch | Oak

DISEASE: Oak leaf scorch

HOST: Oak (Quercus rubra)

PATHOGEN: Xylella fastidiosa

SOURCE: W. Sinclair

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