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 and bacterial leaf streak
HOST: Rice
Xanthomonas oryzae pv. oryzicola (bacterial leaf streak) causes water-soaked streaks with yellow ooze (left side), and X. oryzae pv. oryzae (bacterial blight) causes brown streaks that have turned white (right side).
Bacterial blight and bacterial leaf streak | Rice
DISEASE: Bacterial blight and bacterial leaf streak
HOST: Rice (Oryza sativa)
PATHOGEN: Xanthomonas oryzae pv. oryzicola
PATHOGEN SYNONYM: Xanthomonas campestris pv. oryzae
SOURCE: T. Mew
DISEASE: Bacterial blight
HOST: Gypsophila (Baby's breath)
Gypsophila (baby's breath) with light brown, marginal leaf lesions and distortion.
Bacterial blight | Gypsophila (Baby's breath)
DISEASE: Bacterial blight
HOST: Gypsophila (Baby's breath) (Gypsophila paniculata)
PATHOGEN: Burkholderia andropogonis
PATHOGEN SYNONYM: Pseudomonas andropogonis
SOURCE: A. Hayward
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
DISEASE: Bacterial blight
HOST: Rice
Paddy of dead seedlings with white leaves, characteristic of kresek stage of disease.
Bacterial blight | Rice
DISEASE: Bacterial blight
HOST: Rice (Oryza sativa)
PATHOGEN: Xanthomonas oryzae pv. oryzae
PATHOGEN SYNONYM: Xanthomonas campestris pv. oryzae
SOURCE: T. Mew