DISEASE: Aster yellows
HOST: Potato
Chlorotic and stunted foliage with necrotic leaf margins. Other symptoms may be phyllody, virescence, purple or yellow pigmentation, and rolling of leaflets.
Aster yellows | Potato
DISEASE: Aster yellows
HOST: Potato (Solanum tuberosum)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: S. Thomson
DISEASE: Aster yellows
HOST: Potato
Stunted, chlorotic plants (left) with stiff, rolled leaves.
Aster yellows | Potato
DISEASE: Aster yellows
HOST: Potato (Solanum tuberosum)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: S. Thomson
DISEASE: Aster yellows
HOST: Potato
Diseased plant with malformed tubers.
Aster yellows | Potato
DISEASE: Aster yellows
HOST: Potato (Solanum tuberosum)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: S. Thomson
DISEASE: Bacterial blight
HOST: Tulip
The disease causes white veins of leaves, yellow vascular bundles, and yellow bacterial slime on bulbs.
Bacterial blight | Tulip
DISEASE: Bacterial blight
HOST: Tulip (Tulipa sp. 'Paul Richter')
PATHOGEN: Curtobacterium flaccumfaciens pv. oortii
PATHOGEN SYNONYM: Corynebacterium flaccumfaciens subsp. oortii
SOURCE: M. Geesteranus, J. van der Wolf
DISEASE: Bacterial blight
HOST: Tulip
Stunted plants with wrinkled leaves.
Bacterial blight | Tulip
DISEASE: Bacterial blight
HOST: Tulip (Tulipa sp. 'Paul Richter')
PATHOGEN: Curtobacterium flaccumfaciens pv. oortii
PATHOGEN SYNONYM: Corynebacterium flaccumfaciens subsp. oortii
SOURCE: M. Geesteranus, J. van der Wolf
DISEASE: Bacterial leaf blight and stalk rot
HOST: Corn (Maize)
Corn husk leaves with brownish red streaks and blotches. The leaves turn brown but may later become gray or white. Symptoms vary depending upon genotype.
Bacterial leaf blight and stalk rot | Corn (Maize)
DISEASE: Bacterial leaf blight and stalk rot
HOST: Corn (Maize) (Zea mays)
PATHOGEN: Acidovorax avenae
PATHOGEN SYNONYM: Acidovorax avenae subsp. avenae
SOURCE: A. Alvarez
DISEASE: Bacterial leaf blight and stalk rot
HOST: Corn (Maize)
Leaves with whitish streaks.
Bacterial leaf blight and stalk rot | Corn (Maize)
DISEASE: Bacterial leaf blight and stalk rot
HOST: Corn (Maize) (Zea mays)
PATHOGEN: Acidovorax avenae
PATHOGEN SYNONYM: Acidovorax avenae subsp. avenae
SOURCE: R. Gitaitis
DISEASE: Bacterial leaf blight and stalk rot
HOST: Corn (Maize)
Lesions may vary from brown to red, sometimes gray or white, and some genotypes have red borders around lesions.
Bacterial leaf blight and stalk rot | Corn (Maize)
DISEASE: Bacterial leaf blight and stalk rot
HOST: Corn (Maize) (Zea mays)
PATHOGEN: Acidovorax avenae
PATHOGEN SYNONYM: Acidovorax avenae subsp. avenae
SOURCE: R. Gitaitis
DISEASE: Bacterial ring rot
HOST: Potato
Stunted plant with withered leaves (right).
Bacterial ring rot | Potato
DISEASE: Bacterial ring rot
HOST: Potato (Solanum tuberosum)
PATHOGEN: Clavibacter michiganensis subsp. sepedonicus
SOURCE: M. Schroth