RESULTS

(3)

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DISEASE: Alfalfa dwarf

HOST: Alfalfa

Alfalfa dwarf is characterized by stunted plants (left), usually dark blue-green in color. Xylem tissues become brown, especially when exposed to air.

Alfalfa dwarf | Alfalfa

DISEASE: Alfalfa dwarf

HOST: Alfalfa (Medicago sativa)

PATHOGEN: Xylella fastidiosa

SOURCE: R. M. Davis

DISEASE: Bacterial leaf streak and stripe

HOST: Grass

Vasey grass with yellowish to brownish red streaks and stripes.

Bacterial leaf streak and stripe | Grass

DISEASE: Bacterial leaf streak and stripe

HOST: Grass (Paspalum urvillei)

PATHOGEN: Acidovorax avenae

PATHOGEN SYNONYM: Acidovorax avenae subsp. avenae

SOURCE: R. Gitaitis

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