DISEASE: Bacterial leaf spot
HOST: Collard
Leaf with several kinds of spots. Small necrotic lesions with yellow halos, brown lesions, and large, brown necrotic areas caused by coalescing of lesions.
Bacterial leaf spot | Collard
DISEASE: Bacterial leaf spot
HOST: Collard (Brassica oleracea var. acephala)
PATHOGEN: Pseudomonas syringae pv. maculicola
SOURCE: S. Miller
DISEASE: Bacterial needle blight
HOST: China fir
Leaves with brown blotches. Some are dead.
Bacterial needle blight | China fir
DISEASE: Bacterial needle blight
HOST: China fir (Cunninghamia lanceolata)
PATHOGEN: Pseudomonas syringae pv. cunninghamiae
SOURCE: M. Goto
DISEASE: Dogwood stunt
HOST: Dogwood
Diseased plant with small leaves (left).
Dogwood stunt | Dogwood
DISEASE: Dogwood stunt
HOST: Dogwood (Cornus sp.)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: W. Sinclair
DISEASE: Witches'-broom
HOST: Dogwood
Witches'-broom of eastern dogwood.
Witches'-broom | Dogwood
DISEASE: Witches'-broom
HOST: Dogwood (Cornus sp.)
PATHOGEN: 'Candidatus Phytoplasma' sp.
PATHOGEN SYNONYM: Phytoplasma (undefined)
SOURCE: W. Sinclair