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: Halo blight
HOST: Rice
Leaves with yellowish brown lesions, 2 to 10 mm in diameter. Lesions are surrounded by distinct halos. Later, brown spots or stripes may develop in the center.
Halo blight | Rice
DISEASE: Halo blight
HOST: Rice (Oryza sativa)
PATHOGEN: Pseudomonas syringae pv. oryzae
SOURCE: H. Kuwata
DISEASE: Sheath brown rot
HOST: Rice
Disease symptoms typically occur on flag leaf sheaths from booting to heading stage and also on panicles. Water-soaked lesions on glumes turn light brown.
Sheath brown rot | Rice
DISEASE: Sheath brown rot
HOST: Rice (Oryza sativa)
PATHOGEN: Burkholderia fuscovaginae
PATHOGEN SYNONYM: Pseudomonas fuscovaginae
SOURCE: K. Miyajima, M. Goto
DISEASE: Sheath brown rot
HOST: Rice
Close-up of stem lesions.
Sheath brown rot | Rice
DISEASE: Sheath brown rot
HOST: Rice (Oryza sativa)
PATHOGEN: Burkholderia fuscovaginae
PATHOGEN SYNONYM: Pseudomonas fuscovaginae
SOURCE: K. Miyajima, M. Goto
DISEASE: Sheath brown rot
HOST: Rice
Seedling with rot symptoms.
Sheath brown rot | Rice
DISEASE: Sheath brown rot
HOST: Rice (Oryza sativa)
PATHOGEN: Burkholderia fuscovaginae
PATHOGEN SYNONYM: Pseudomonas fuscovaginae
SOURCE: K. Miyajima, M. Goto
DISEASE: Sheath brown rot
HOST: Rice
Diseased, unhulled grains with brown discoloration. Healthy grain (left).
Sheath brown rot | Rice
DISEASE: Sheath brown rot
HOST: Rice (Oryza sativa)
PATHOGEN: Burkholderia fuscovaginae
PATHOGEN SYNONYM: Pseudomonas fuscovaginae
SOURCE: K. Miyajima, M. Goto