DISEASE: Bacterial blight
HOST: Grass
Timothy grass with light-colored lesions caused by unidentified Xanthomonas sp.
Bacterial blight | Grass
DISEASE: Bacterial blight
HOST: Grass (Phleum pratense)
PATHOGEN: Xanthomonas sp.
SOURCE: M. Shurtleff
DISEASE: Bacterial leaf spot (Blight)
HOST: Elderberry
Elderberry with dark brown to blackish angular leaf spots.
Bacterial leaf spot (Blight) | Elderberry
DISEASE: Bacterial leaf spot (Blight)
HOST: Elderberry (Sambucus racemosa)
PATHOGEN: Xanthomonas sp.
SOURCE: S. Mohan
DISEASE: Bacterial leaf spot
HOST: Alfalfa
Stems with necrotic lesions.
Bacterial leaf spot | Alfalfa
DISEASE: Bacterial leaf spot
HOST: Alfalfa (Medicago sativa)
PATHOGEN: Xanthomonas alfalfae subsp. alfalfae
PATHOGEN SYNONYM: Xanthomonas campestris pv. alfalfae
SOURCE: APS
DISEASE: Bacterial leaf spot
HOST: Alfalfa
Leaves with brown necrotic spots. Stems have water-soaked spots.
Bacterial leaf spot | Alfalfa
DISEASE: Bacterial leaf spot
HOST: Alfalfa (Medicago sativa)
PATHOGEN: Xanthomonas alfalfae subsp. alfalfae
PATHOGEN SYNONYM: Xanthomonas campestris pv. alfalfae
SOURCE: S. Thomson
DISEASE: Bacterial leaf spot
HOST: Alfalfa
Leaves with both water-soaked and necrotic spots.
Bacterial leaf spot | Alfalfa
DISEASE: Bacterial leaf spot
HOST: Alfalfa (Medicago sativa)
PATHOGEN: Xanthomonas alfalfae subsp. alfalfae
PATHOGEN SYNONYM: Xanthomonas campestris pv. alfalfae
SOURCE: APS
DISEASE: Bacterial leaf spot
HOST: Alfalfa
Leaves with necrotic, brownish paperlike areas.
Bacterial leaf spot | Alfalfa
DISEASE: Bacterial leaf spot
HOST: Alfalfa (Medicago sativa)
PATHOGEN: Xanthomonas alfalfae subsp. alfalfae
PATHOGEN SYNONYM: Xanthomonas campestris pv. alfalfae
SOURCE: APS
DISEASE: Fire blight
HOST: Apple
Severe infection of apple with dying twigs and branches.
Fire blight | Apple
DISEASE: Fire blight
HOST: Apple (Malus domestica)
PATHOGEN: Erwinia amylovora
SOURCE: S. Thomson
DISEASE: Fire blight
HOST: Apple
Diseased apple with copious ooze.
Fire blight | Apple
DISEASE: Fire blight
HOST: Apple (Malus domestica 'Jonathan')
PATHOGEN: Erwinia amylovora
SOURCE: S. Mohan
DISEASE: Fire blight
HOST: Apple
Canker on trunk oozing fire blight bacteria.
Fire blight | Apple
DISEASE: Fire blight
HOST: Apple (Malus domestica)
PATHOGEN: Erwinia amylovora
SOURCE: S. Thomson