DISEASE: Aster yellows
HOST: Chrysanthemum
Stunted diseased plant with small distorted flowers.
Aster yellows | Chrysanthemum
DISEASE: Aster yellows
HOST: Chrysanthemum (Chrysanthemum morifolium)
PATHOGEN: 'Candidatus Phytoplasma asteris'
PATHOGEN SYNONYM: Phytoplasma Aster yellows group
SOURCE: B. Raju, M. Davis
DISEASE: Bacterial brown spot
HOST: Mallotus
Leaf with small, rustylike lesions.
Bacterial brown spot | Mallotus
DISEASE: Bacterial brown spot
HOST: Mallotus (Mallotus japonicus)
PATHOGEN: Xanthomonas campestris pv. malloti
SOURCE: M. Goto
DISEASE: Bacterial brown spot
HOST: Mallotus
Leaf with tiny, light brown spots surrounded by chlorotic zones.
Bacterial brown spot | Mallotus
DISEASE: Bacterial brown spot
HOST: Mallotus (Mallotus japonicus)
PATHOGEN: Xanthomonas campestris pv. malloti
SOURCE: M. Kobayashi, M. Goto
DISEASE: Bacterial fasciation (Leafy gall)
HOST: Chrysanthemum
Fasciation of chrysanthemum.
Bacterial fasciation (Leafy gall) | Chrysanthemum
DISEASE: Bacterial fasciation (Leafy gall)
HOST: Chrysanthemum (Chrysanthemum morifolium)
PATHOGEN: Rhodococcus fascians
SOURCE: M. Schroth
DISEASE: Bacterial leaf spot (Blight)
HOST: Poinsettia
Blighted leaves and stems.
Bacterial leaf spot (Blight) | Poinsettia
DISEASE: Bacterial leaf spot (Blight)
HOST: Poinsettia (Euphorbia pulcherrima)
PATHOGEN: Curtobacterium flaccumfaciens pv. poinsettiae
SOURCE: APS
DISEASE: Bacterial leaf spot (Blight)
HOST: Poinsettia
Poinsettia with diseased stem. Woody stems may have a yellowed cortex and dark vascular tissues. The stem tip may curve with deformed terminal leaves.
Bacterial leaf spot (Blight) | Poinsettia
DISEASE: Bacterial leaf spot (Blight)
HOST: Poinsettia (Euphorbia pulcherrima)
PATHOGEN: Curtobacterium flaccumfaciens pv. poinsettiae
SOURCE: APS
DISEASE: Bacterial leaf spot (Blight)
HOST: Poinsettia
Leaves with small, dark spots, an early stage of disease.
Bacterial leaf spot (Blight) | Poinsettia
DISEASE: Bacterial leaf spot (Blight)
HOST: Poinsettia (Euphorbia pulcherrima)
PATHOGEN: Curtobacterium flaccumfaciens pv. poinsettiae
SOURCE: A. Alvarez
DISEASE: Bacterial leaf spot
HOST: Mallotus
Leaf with dark and water-soaked lesions along veins.
Bacterial leaf spot | Mallotus
DISEASE: Bacterial leaf spot
HOST: Mallotus (Mallotus japonicus)
PATHOGEN: Erwinia mallotivora
SOURCE: M. Kobayashi, M. Goto
DISEASE: Bacterial leaf spot
HOST: Mallotus
Leaves with water-soaking, and one also with dark spots surrounded by chlorotic tissues.
Bacterial leaf spot | Mallotus
DISEASE: Bacterial leaf spot
HOST: Mallotus (Mallotus japonicus)
PATHOGEN: Erwinia mallotivora
SOURCE: M. Kobayashi, M. Goto