DISEASE: Bacterial leaf spot
HOST: Cowpea
Leaf spots vary in size from small to large and some fall out in time, leaving a shot-hole appearance.
Bacterial leaf spot | Cowpea
DISEASE: Bacterial leaf spot
HOST: Cowpea (Vigna unguiculata)
PATHOGEN: Xanthomonas axonopodis pv. vignicola
PATHOGEN SYNONYM: Xanthomonas campestris pv. vignicola
SOURCE: R. Gitaitis
DISEASE: Bacterial leaf spot
HOST: Cowpea
Leaves with large, light brown necrotic areas.
Bacterial leaf spot | Cowpea
DISEASE: Bacterial leaf spot
HOST: Cowpea (Vigna unguiculata)
PATHOGEN: Xanthomonas axonopodis pv. vignicola
PATHOGEN SYNONYM: Xanthomonas campestris pv. vignicola
SOURCE: R. Gitaitis
DISEASE: Bacterial leaf spot
HOST: Croton
Tan, irregular-sized lesions on lower leaf surfaces.
Bacterial leaf spot | Croton
DISEASE: Bacterial leaf spot
HOST: Croton (Codiaeum variegatum var. pictum)
PATHOGEN: Xanthomonas axonopodis pv. poinsettiicola
PATHOGEN SYNONYM: Xanthomonas campestris pv. poinsettiicola
SOURCE: J. Yuen
DISEASE: Bacterial leaf spot
HOST: Crown-of-thorns
Leaves with brown lesions surrounded by bright yellow halos.
Bacterial leaf spot | Crown-of-thorns
DISEASE: Bacterial leaf spot
HOST: Crown-of-thorns (Euphorbia milii)
PATHOGEN: Xanthomonas axonopodis pv. poinsettiicola
PATHOGEN SYNONYM: Xanthomonas campestris pv. poinsettiicola
SOURCE: APS
DISEASE: Bacterial leaf spot
HOST: Poinsettia
Leaves with reddish brown blighted areas and spots. Severely spotted leaves turn yellow and dehisce.
Bacterial leaf spot | Poinsettia
DISEASE: Bacterial leaf spot
HOST: Poinsettia (Euphorbia pulcherrima)
PATHOGEN: Xanthomonas axonopodis pv. poinsettiicola
PATHOGEN SYNONYM: Xanthomonas campestris pv. poinsettiicola
SOURCE: A. Chase
DISEASE: Pith necrosis
HOST: Geranium
Geranium with wilted, yellow necrotic leaves.
Pith necrosis | Geranium
DISEASE: Pith necrosis
HOST: Geranium (Pelargonium sp.)
PATHOGEN: Pseudomonas corrugata
SOURCE: A. Magyarosy, D. Thomas
DISEASE: Pith necrosis
HOST: Geranium
Pitted and hollow stems, one of the disease symptoms.
Pith necrosis | Geranium
DISEASE: Pith necrosis
HOST: Geranium (Pelargonium sp.)
PATHOGEN: Pseudomonas corrugata
SOURCE: A. Magyarosy, D. Thomas
DISEASE: Pith necrosis
HOST: Geranium
Discolored stem caused by systemic infection of the pathogen.
Pith necrosis | Geranium
DISEASE: Pith necrosis
HOST: Geranium (Pelargonium sp.)
PATHOGEN: Pseudomonas corrugata
SOURCE: A. Magyarosy, D. Thomas
DISEASE: Pith necrosis
HOST: Tomato
Cracked, dry, hollow stems with internal necrosis.
Pith necrosis | Tomato
DISEASE: Pith necrosis
HOST: Tomato (Lycopersicon esculentum)
PATHOGEN: Pseudomonas corrugata
SOURCE: A. Alvarez