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: Potato
Chlorotic and stunted foliage with necrotic leaf margins. Other symptoms may be phyllody, virescence, purple or yellow pigmentation, and rolling of leaflets.
Aster yellows | Potato
DISEASE: Aster yellows
HOST: Potato (Solanum tuberosum)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: S. Thomson
DISEASE: Aster yellows
HOST: Potato
Stunted, chlorotic plants (left) with stiff, rolled leaves.
Aster yellows | Potato
DISEASE: Aster yellows
HOST: Potato (Solanum tuberosum)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: S. Thomson
DISEASE: Aster yellows
HOST: Potato
Diseased plant with malformed tubers.
Aster yellows | Potato
DISEASE: Aster yellows
HOST: Potato (Solanum tuberosum)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: S. Thomson
DISEASE: Bacterial leaf spot (Blight)
HOST: Coriander
Coriander with spots and yellowing of blighted leaves.
Bacterial leaf spot (Blight) | Coriander
DISEASE: Bacterial leaf spot (Blight)
HOST: Coriander (Coriandrum sativum)
PATHOGEN: Pseudomonas syringae pv. coriandricola
SOURCE: L. Fucikovsky
DISEASE: Bacterial leaf spot
HOST: Cilantro
Leaves with vein-delimited, dark brown to black spots.
Bacterial leaf spot | Cilantro
DISEASE: Bacterial leaf spot
HOST: Cilantro (Coriandrum sativum)
PATHOGEN: Pseudomonas syringae pv. coriandricola
SOURCE: K. Pernezny
DISEASE: Bacterial ring rot
HOST: Potato
Stunted plant with withered leaves (right).
Bacterial ring rot | Potato
DISEASE: Bacterial ring rot
HOST: Potato (Solanum tuberosum)
PATHOGEN: Clavibacter michiganensis subsp. sepedonicus
SOURCE: M. Schroth
DISEASE: Bacterial ring rot
HOST: Potato
Infected leaf with advanced stage of interveinal necrosis.
Bacterial ring rot | Potato
DISEASE: Bacterial ring rot
HOST: Potato (Solanum tuberosum)
PATHOGEN: Clavibacter michiganensis subsp. sepedonicus
SOURCE: S. Thomson
DISEASE: Bacterial ring rot
HOST: Potato
Foliage symptoms are upward rolling of leaves and marginal necrosis of lower leaves.
Bacterial ring rot | Potato
DISEASE: Bacterial ring rot
HOST: Potato (Solanum tuberosum)
PATHOGEN: Clavibacter michiganensis subsp. sepedonicus
SOURCE: G. Franc