DISEASE: Bacterial leaf spot
HOST: Nephthytis
Leaf with concentric rings of dark tissues. There has been confusion of the causal agent with Dickeya sp., which also causes mushy leaf spots.
Bacterial leaf spot | Nephthytis
DISEASE: Bacterial leaf spot
HOST: Nephthytis (Syngonium podophyllum)
PATHOGEN: Pectobacterium carotovorum
PATHOGEN SYNONYM: Erwinia carotovora subsp. carotovora
SOURCE: A. Chase
DISEASE: Bacterial leaf spot
HOST: Nephthytis
Water-soaked tissues and large, dark brown necrotic areas at leaf margins. Healthy (center leaf).
Bacterial leaf spot | Nephthytis
DISEASE: Bacterial leaf spot
HOST: Nephthytis (Syngonium podophyllum)
PATHOGEN: Pseudomonas cichorii
SOURCE: S. Thomson
DISEASE: Brown blotch
HOST: Mushroom
Mushrooms with rotted, brownish discoloration of infected areas.
Brown blotch | Mushroom
DISEASE: Brown blotch
HOST: Mushroom (Agaricus campestris)
PATHOGEN: Pseudomonas tolaasii
SOURCE: J. Young
DISEASE: Drippy gill
HOST: Mushroom
Drippy gill is characterized by small dark spots on gills with drops of bacterial ooze at the centers. Severe infection results in slimy areas and collapse of gills.
Drippy gill | Mushroom
DISEASE: Drippy gill
HOST: Mushroom (Agaricus campestris)
PATHOGEN: Pseudomonas agarici
SOURCE: J. Young
DISEASE: Drippy gill
HOST: Mushroom
Close-up of infected gills with bacterial ooze.
Drippy gill | Mushroom
DISEASE: Drippy gill
HOST: Mushroom (Agaricus campestris)
PATHOGEN: Pseudomonas agarici
SOURCE: J. Young
DISEASE: Drippy gill
HOST: Mushroom
Another view of small, dark spots on gills.
Drippy gill | Mushroom
DISEASE: Drippy gill
HOST: Mushroom (Agaricus campestris)
PATHOGEN: Pseudomonas agarici
SOURCE: J. Young
DISEASE: Fire blight
HOST: Pluot
Fire blight cankers on major limb. Pluot is an interspecific hybrid of plum and apricot.
Fire blight | Pluot
DISEASE: Fire blight
HOST: Pluot (Prunus hybrid 'Dandy Dapple')
PATHOGEN: Erwinia amylovora
SOURCE: S. Mohan
DISEASE: Fire blight
HOST: Pluot
Dead shoot, the result of systemic infection.
Fire blight | Pluot
DISEASE: Fire blight
HOST: Pluot (Prunus hybrid 'Dandy Dapple')
PATHOGEN: Erwinia amylovora
SOURCE: S. Mohan
DISEASE: Fire blight
HOST: Pluot
Typical symptoms of fire blight-infected shoot.
Fire blight | Pluot
DISEASE: Fire blight
HOST: Pluot (Prunus hybrid 'Dandy Dapple')
PATHOGEN: Erwinia amylovora
SOURCE: S. Mohan