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 blight (Black leaf blight)
HOST: Canna
Canna with yellowing and blackened tissues.
Bacterial blight (Black leaf blight) | Canna
DISEASE: Bacterial blight (Black leaf blight)
HOST: Canna (Canna sp.)
PATHOGEN: Xanthomonas campestris pv. cannae
SOURCE: A. Alvarez
DISEASE: Bacterial leaf spot and blight
HOST: Fern
Leaf with small lesions that coalesced into large, reddish brown necrotic area.
Bacterial leaf spot and blight | Fern
DISEASE: Bacterial leaf spot and blight
HOST: Fern (Asplenium nidus)
PATHOGEN: Burkholderia gladioli pv. gladioli
PATHOGEN SYNONYM: Pseudomonas gladioli pv. gladioli
SOURCE: APS
DISEASE: Bacterial leaf spot
HOST: Fern
Leaf with large, dark, longitudinal necrotic areas that differ from symptoms normally described for this disease.
Bacterial leaf spot | Fern
DISEASE: Bacterial leaf spot
HOST: Fern (Asplenium nidus)
PATHOGEN: Pseudomonas asplenii
SOURCE: R. Raabe