DISEASE: Ash yellows
HOST: Ash
Ash sapling with basal sprouts and chlorotic leaves.
Ash yellows | Ash
DISEASE: Ash yellows
HOST: Ash (Fraxinus pennsylvanica)
PATHOGEN: 'Candidatus Phytoplasma fraxini'
PATHOGEN SYNONYM: Phytoplasma Ash yellows group
SOURCE: W. Sinclair
DISEASE: Ash yellows
HOST: Ash
Witches'-broom at base of declining tree.
Ash yellows | Ash
DISEASE: Ash yellows
HOST: Ash (Fraxinus velutina)
PATHOGEN: 'Candidatus Phytoplasma fraxini'
PATHOGEN SYNONYM: Phytoplasma Ash yellows group
SOURCE: W. Sinclair
DISEASE: Ash yellows
HOST: Ash
Forest of declining trees, some chlorotic and others with dieback.
Ash yellows | Ash
DISEASE: Ash yellows
HOST: Ash (Fraxinus americana)
PATHOGEN: 'Candidatus Phytoplasma fraxini'
PATHOGEN SYNONYM: Phytoplasma Ash yellows group
SOURCE: W. Sinclair
DISEASE: Ash yellows
HOST: Ash
White ash with deliquescent branching.
Ash yellows | Ash
DISEASE: Ash yellows
HOST: Ash (Fraxinus americana)
PATHOGEN: 'Candidatus Phytoplasma fraxini'
PATHOGEN SYNONYM: Phytoplasma Ash yellows group
SOURCE: W. Sinclair
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 blight
HOST: Rice
Gradation in blight symptoms. The disease begins as water-soaked streaks on leaves, which increase in length and width, becoming yellow and then white.
Bacterial blight | Rice
DISEASE: Bacterial blight
HOST: Rice (Oryza sativa)
PATHOGEN: Xanthomonas oryzae pv. oryzae
PATHOGEN SYNONYM: Xanthomonas campestris pv. oryzae
SOURCE: T. Mew
DISEASE: Bacterial blight
HOST: Rice
Yellow leaf stripe that later turns white.
Bacterial blight | Rice
DISEASE: Bacterial blight
HOST: Rice (Oryza sativa)
PATHOGEN: Xanthomonas oryzae pv. oryzae
PATHOGEN SYNONYM: Xanthomonas campestris pv. oryzae
SOURCE: A. Alvarez
DISEASE: Bacterial blight
HOST: Rice
Infected leaves have grayish white lesions with wavy margins.
Bacterial blight | Rice
DISEASE: Bacterial blight
HOST: Rice (Oryza sativa)
PATHOGEN: Xanthomonas oryzae pv. oryzae
PATHOGEN SYNONYM: Xanthomonas campestris pv. oryzae
SOURCE: M. Goto
DISEASE: Bacterial blight
HOST: Rice
Gray leaf lesions typical of bacterial blight.
Bacterial blight | Rice
DISEASE: Bacterial blight
HOST: Rice (Oryza sativa)
PATHOGEN: Xanthomonas oryzae pv. oryzae
PATHOGEN SYNONYM: Xanthomonas campestris pv. oryzae
SOURCE: T. Mew