DISEASE: Apple proliferation
HOST: Apple
Enlarged stipules on leaf. Witches'-brooms, rosettes, and enlarged stipules are the most reliable symptoms for identification.
Apple proliferation | Apple
DISEASE: Apple proliferation
HOST: Apple (Malus domestica 'Granny Smith')
PATHOGEN: 'Candidatus Phytoplasma mali'
PATHOGEN SYNONYM: Phytoplasma Apple proliferation group
SOURCE: M. Wolf, W. Schweigkofler
DISEASE: Aster yellows
HOST: Aster
Foliar symptoms of chlorosis, malformation of leaves, and phyllody.
Aster yellows | Aster
DISEASE: Aster yellows
HOST: Aster (Aster sp.)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: R. McCoy, M. Davis
DISEASE: Aster yellows
HOST: Aster
Flowers with phyllody (left and center). Healthy flower (right).
Aster yellows | Aster
DISEASE: Aster yellows
HOST: Aster (Aster sp.)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: R. McCoy, M. Davis
DISEASE: Aster yellows
HOST: Aster
Macrosteles sp., a leafhopper vector of aster yellows phytoplasma.
Aster yellows | Aster
DISEASE: Aster yellows
HOST: Aster (Aster sp.)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: J. Clark, A. Purcell, M. Davis
DISEASE: Bacterial canker
HOST: Tomato
Necrosis of leaf margins is early symptom of disease.
Bacterial canker | Tomato
DISEASE: Bacterial canker
HOST: Tomato (Lycopersicon esculentum)
PATHOGEN: Clavibacter michiganensis subsp. michiganensis
PATHOGEN SYNONYM: Corynebacterium michiganense
SOURCE: S. Miller
DISEASE: Bacterial canker
HOST: Tomato
Leaves with interveinal necrosis.
Bacterial canker | Tomato
DISEASE: Bacterial canker
HOST: Tomato (Lycopersicon esculentum)
PATHOGEN: Clavibacter michiganensis subsp. michiganensis
PATHOGEN SYNONYM: Corynebacterium michiganense
SOURCE: D. Ingram
DISEASE: Bacterial canker
HOST: Tomato
Leaves with papery, gray necrotic areas around green veins.
Bacterial canker | Tomato
DISEASE: Bacterial canker
HOST: Tomato (Lycopersicon esculentum)
PATHOGEN: Clavibacter michiganensis subsp. michiganensis
PATHOGEN SYNONYM: Corynebacterium michiganense
SOURCE: D. Ingram
DISEASE: Bacterial canker
HOST: Tomato
Sliced stem with yellowish brown discoloration of vascular tissues.
Bacterial canker | Tomato
DISEASE: Bacterial canker
HOST: Tomato (Lycopersicon esculentum)
PATHOGEN: Clavibacter michiganensis subsp. michiganensis
PATHOGEN SYNONYM: Corynebacterium michiganense
SOURCE: S. Miller
DISEASE: Bacterial canker
HOST: Tomato
Advanced stage of disease with reddish brown discoloration of vascular tissues (bottom). Healthy stem (top).
Bacterial canker | Tomato
DISEASE: Bacterial canker
HOST: Tomato (Lycopersicon esculentum)
PATHOGEN: Clavibacter michiganensis subsp. michiganensis
PATHOGEN SYNONYM: Corynebacterium michiganense
SOURCE: D. Ingram