DISEASE: Australian citrus dieback
HOST: Citrus (Grapefruit)
Leaves with mottled chlorosis.
Australian citrus dieback | Citrus (Grapefruit)
DISEASE: Australian citrus dieback
HOST: Citrus (Grapefruit) (Citrus paradisi)
PATHOGEN: 'Candidatus Phytoplasma' sp.
PATHOGEN SYNONYM: Phytoplasma (undefined)
SOURCE: P. Broadbent
DISEASE: Australian citrus dieback
HOST: Citrus (Grapefruit)
Late stage of disease. Note yellowing of leaf veins and entire leaves.
Australian citrus dieback | Citrus (Grapefruit)
DISEASE: Australian citrus dieback
HOST: Citrus (Grapefruit) (Citrus paradisi)
PATHOGEN: 'Candidatus Phytoplasma' sp.
PATHOGEN SYNONYM: Phytoplasma (undefined)
SOURCE: P. Broadbent
DISEASE: Bacterial blight (Brown stem)
HOST: Celery
Lesions are necrotic and circular to angular. Some have yellowish halos. Older lesions become brown and dry.
Bacterial blight (Brown stem) | Celery
DISEASE: Bacterial blight (Brown stem)
HOST: Celery (Apium graveolens)
PATHOGEN: Pseudomonas cichorii
SOURCE: R. Raid
DISEASE: Bacterial blight (Brown stem)
HOST: Celery
Ooze from lesion on celery leaf.
Bacterial blight (Brown stem) | Celery
DISEASE: Bacterial blight (Brown stem)
HOST: Celery (Apium graveolens)
PATHOGEN: Pseudomonas cichorii
SOURCE: R. Raid
DISEASE: Bacterial blight (Brown stem)
HOST: Celery
Characteristic brown discoloration of petioles, which is more evident on inside of petiole close to the crown. Parenchyma tissues are firm and brown.
Bacterial blight (Brown stem) | Celery
DISEASE: Bacterial blight (Brown stem)
HOST: Celery (Apium graveolens)
PATHOGEN: Pseudomonas cichorii
SOURCE: K. Pernezny
DISEASE: Bacterial blight
HOST: Bean
Bean leaves with large necrotic areas.
Bacterial blight | Bean
DISEASE: Bacterial blight
HOST: Bean (Phaseolus vulgaris)
PATHOGEN: Xanthomonas axonopodis pv. phaseoli
PATHOGEN SYNONYM: Xanthomonas campestris pv. phaseoli
SOURCE: J. Young
DISEASE: Bacterial blight
HOST: Bean
Field of severely diseased beans.
Bacterial blight | Bean
DISEASE: Bacterial blight
HOST: Bean (Phaseolus vulgaris)
PATHOGEN: Xanthomonas axonopodis pv. phaseoli
PATHOGEN SYNONYM: Xanthomonas campestris pv. phaseoli
SOURCE: M. Shurtleff
DISEASE: Bacterial blight
HOST: Bean
Close-up of necrotic leaf lesions.
Bacterial blight | Bean
DISEASE: Bacterial blight
HOST: Bean (Phaseolus vulgaris)
PATHOGEN: Xanthomonas axonopodis pv. phaseoli
PATHOGEN SYNONYM: Xanthomonas campestris pv. phaseoli
SOURCE: A. Alvarez
DISEASE: Bacterial blight
HOST: Bean
Bean leaflet with large necrotic lesions surrounded by chlorotic zones.
Bacterial blight | Bean
DISEASE: Bacterial blight
HOST: Bean (Phaseolus vulgaris)
PATHOGEN: Xanthomonas axonopodis pv. phaseoli
PATHOGEN SYNONYM: Xanthomonas campestris pv. phaseoli
SOURCE: I. Hubbeling, J. van der Wolf