DISEASE: Aster yellows
HOST: Watercress
Diseased watercress (left) and healthy plant (right).
Aster yellows | Watercress
DISEASE: Aster yellows
HOST: Watercress (Nasturtium officinale)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: W. Borth
DISEASE: Bacterial leaf spot
HOST: Pothos
Leaf with black necrotic tissues with concentric rings of light and dark tissues.
Bacterial leaf spot | Pothos
DISEASE: Bacterial leaf spot
HOST: Pothos (Epipremnum pinnatum)
PATHOGEN: Pseudomonas cichorii
SOURCE: APS
DISEASE: Bacterial wilt
HOST: Pothos
Pothos with infected stem and petioles.
Bacterial wilt | Pothos
DISEASE: Bacterial wilt
HOST: Pothos (Epipremnum aureum)
PATHOGEN: Ralstonia solanacearum
PATHOGEN SYNONYM: Pseudomonas solanacearum
SOURCE: D. Norman
DISEASE: Bacterial wilt
HOST: Pothos
Plant with severely infected leaves and stems.
Bacterial wilt | Pothos
DISEASE: Bacterial wilt
HOST: Pothos (Epipremnum aureum)
PATHOGEN: Ralstonia solanacearum
PATHOGEN SYNONYM: Pseudomonas solanacearum
SOURCE: D. Norman
DISEASE: Black chaff (Bacterial leaf streak)
HOST: Wheatgrass
Lesions on leaves first appear as water-soaked, translucent, long, narrow streaks. They later turn brown and necrotic and often coalesce into blighted areas.
Black chaff (Bacterial leaf streak) | Wheatgrass
DISEASE: Black chaff (Bacterial leaf streak)
HOST: Wheatgrass (Elytrigia intermedia)
PATHOGEN: Xanthomonas translucens pv. cerealis
SOURCE: S. Mohan
DISEASE: Black chaff (Bacterial leaf streak)
HOST: Wheatgrass
Close-up of leaf with brown necrotic streaks.
Black chaff (Bacterial leaf streak) | Wheatgrass
DISEASE: Black chaff (Bacterial leaf streak)
HOST: Wheatgrass (Elytrigia intermedia)
PATHOGEN: Xanthomonas translucens pv. cerealis
SOURCE: S. Mohan