DISEASE: Aster yellows
HOST: Daisy
Daisy with stunted and malformed flowers.
Aster yellows | Daisy
DISEASE: Aster yellows
HOST: Daisy (Euryops speciosissimus)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: R. Raabe
DISEASE: Bacterial blast
HOST: Pear
The bacterium infects all flower parts and may spread and kill the entire spur.
Bacterial blast | Pear
DISEASE: Bacterial blast
HOST: Pear (Pyrus communis)
PATHOGEN: Pseudomonas syringae pv. syringae
SOURCE: W. Sinclair
DISEASE: Bacterial fasciation (Leafy gall)
HOST: Daisy
Bacterial fasciation of daisy.
Bacterial fasciation (Leafy gall) | Daisy
DISEASE: Bacterial fasciation (Leafy gall)
HOST: Daisy (Leucanthemum maximum)
PATHOGEN: Rhodococcus fascians
SOURCE: R. Raabe
DISEASE: Bacterial fasciation (Leafy gall)
HOST: Daisy
Daisy with stem and leaf proliferation.
Bacterial fasciation (Leafy gall) | Daisy
DISEASE: Bacterial fasciation (Leafy gall)
HOST: Daisy (Leucanthemum maximum)
PATHOGEN: Rhodococcus fascians
SOURCE: M. Putnam
DISEASE: Bacterial leaf spot
HOST: Croton
Tan, irregular-sized lesions on lower leaf surfaces.
Bacterial leaf spot | Croton
DISEASE: Bacterial leaf spot
HOST: Croton (Codiaeum variegatum var. pictum)
PATHOGEN: Xanthomonas axonopodis pv. poinsettiicola
PATHOGEN SYNONYM: Xanthomonas campestris pv. poinsettiicola
SOURCE: J. Yuen
DISEASE: Bacterial leaf spot
HOST: Croton
Leaves with dry, irregularly shaped, brown necrotic areas.
Bacterial leaf spot | Croton
DISEASE: Bacterial leaf spot
HOST: Croton (Codiaeum variegatum)
PATHOGEN: Xanthomonas codiaei
SOURCE: A. Chase
DISEASE: Crown gall
HOST: Pear
Crown gall of pear rootstock.
Crown gall | Pear
DISEASE: Crown gall
HOST: Pear (Pyrus communis)
PATHOGEN: Agrobacterium tumefaciens
PATHOGEN SYNONYM: Rhizobium sp.
SOURCE: H. Sawada, M. Goto
DISEASE: Fire blight
HOST: Pear
Blighted shoot and blossoms.
Fire blight | Pear
DISEASE: Fire blight
HOST: Pear (Pyrus communis)
PATHOGEN: Erwinia amylovora
SOURCE: M. Schroth
DISEASE: Fire blight
HOST: Pear
Typical appearance of advanced stage of disease after the bacterium invades from shoot tips/flowers downward.
Fire blight | Pear
DISEASE: Fire blight
HOST: Pear (Pyrus communis)
PATHOGEN: Erwinia amylovora
SOURCE: M. Schroth