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: Bacterial wilt
HOST: Carnation
Carnation stem with cankers and cracks. Yellow sticky bacterial slime is often seen.
Bacterial wilt | Carnation
DISEASE: Bacterial wilt
HOST: Carnation (Dianthus caryophyllus)
PATHOGEN: Burkholderia caryophylli
PATHOGEN SYNONYM: Pseudomonas caryophylli
SOURCE: E. Hellmers, Royal Veterinary & Agricultural University
DISEASE: Bacterial wilt
HOST: Carnation
Severely diseased and withered plants.
Bacterial wilt | Carnation
DISEASE: Bacterial wilt
HOST: Carnation (Dianthus caryophyllus)
PATHOGEN: Burkholderia caryophylli
PATHOGEN SYNONYM: Pseudomonas caryophylli
SOURCE: T. Saito, M. Goto
DISEASE: Bacterial wilt
HOST: Carnation
Sliced stem with discolored vascular bundles.
Bacterial wilt | Carnation
DISEASE: Bacterial wilt
HOST: Carnation (Dianthus caryophyllus)
PATHOGEN: Burkholderia caryophylli
PATHOGEN SYNONYM: Pseudomonas caryophylli
SOURCE: T. Saito, M. Goto
DISEASE: Bacterial wilt
HOST: Carnation
Systemic infection caused cracking and necrosis of the stem.
Bacterial wilt | Carnation
DISEASE: Bacterial wilt
HOST: Carnation (Dianthus caryophyllus)
PATHOGEN: Burkholderia caryophylli
PATHOGEN SYNONYM: Pseudomonas caryophylli
SOURCE: R. Raabe
DISEASE: Citrus canker
HOST: Citrus (Orange)
Leaf with leaf miner tunnels and numerous cankerlike lesions.
Citrus canker | Citrus (Orange)
DISEASE: Citrus canker
HOST: Citrus (Orange) (Citrus sinensis)
PATHOGEN: Xanthomonas citri subsp. citri
PATHOGEN SYNONYM: Xanthomonas citri
SOURCE: T. Gottwald
DISEASE: Citrus canker
HOST: Citrus (Orange)
Upper side of leaves with corky, raised lesions surrounded by yellow halos, a late stage of disease. Such infections usually are visible on lower sides of leaves first and soon after on upper sides.
Citrus canker | Citrus (Orange)
DISEASE: Citrus canker
HOST: Citrus (Orange) (Citrus sinensis)
PATHOGEN: Xanthomonas citri subsp. citri
PATHOGEN SYNONYM: Xanthomonas citri
SOURCE: J. H. Graham
DISEASE: Citrus canker
HOST: Citrus (Orange)
Yellowish halos are seen around lesions on the upper leaf surface, whereas lesions on the lower surface are more corky in appearance and have sunken centers without halos.
Citrus canker | Citrus (Orange)
DISEASE: Citrus canker
HOST: Citrus (Orange) (Citrus sinensis)
PATHOGEN: Xanthomonas citri subsp. citri
PATHOGEN SYNONYM: Xanthomonas citri
SOURCE: J. Young