DISEASE: Bacterial seed and seedling rot
HOST: Geranium
Cotyledons with water-soaked spots.
Bacterial seed and seedling rot | Geranium
DISEASE: Bacterial seed and seedling rot
HOST: Geranium (Pelargonium sp.)
PATHOGEN: Paenibacillus sp.
SOURCE: A. Magyarosy, D. Thomas
DISEASE: Bacterial seed and seedling rot
HOST: Geranium
Rotted and discolored seeds (right). Healthy seeds (left).
Bacterial seed and seedling rot | Geranium
DISEASE: Bacterial seed and seedling rot
HOST: Geranium (Pelargonium sp.)
PATHOGEN: Paenibacillus sp.
SOURCE: A. Magyarosy, D. Thomas
DISEASE: Bacterial stem rot
HOST: Poinsettia
Water-soaked and rotted stem and leaf tissues.
Bacterial stem rot | Poinsettia
DISEASE: Bacterial stem rot
HOST: Poinsettia (Euphorbia pulcherrima)
PATHOGEN: Dickeya dadantii
PATHOGEN SYNONYM: Erwinia chrysanthemi
SOURCE: M. Daughtrey
DISEASE: Bacterial stem rot
HOST: Poinsettia
The disease causes translucence, discoloration, and rot of stems.
Bacterial stem rot | Poinsettia
DISEASE: Bacterial stem rot
HOST: Poinsettia (Euphorbia pulcherrima)
PATHOGEN: Dickeya dadantii
PATHOGEN SYNONYM: Erwinia chrysanthemi
SOURCE: M. Daughtrey
DISEASE: Bacterial wilt
HOST: Geranium
Necrotic, umbrella-like appearance of infected leaves, an early stage of disease. Lower leaves become yellow and necrosis develops as the disease progresses. V-shaped necrosis is typical of other systemic diseases.
Bacterial wilt | Geranium
DISEASE: Bacterial wilt
HOST: Geranium (Pelargonium sp.)
PATHOGEN: Ralstonia solanacearum
PATHOGEN SYNONYM: Pseudomonas solanacearum
SOURCE: M. Daughtrey
DISEASE: Bacterial wilt
HOST: Geranium
Cross section of wilted geranium with infected vascular tissues and bacterial ooze.
Bacterial wilt | Geranium
DISEASE: Bacterial wilt
HOST: Geranium (Pelargonium sp.)
PATHOGEN: Ralstonia solanacearum
PATHOGEN SYNONYM: Pseudomonas solanacearum
SOURCE: M. Daughtrey
DISEASE: Bacterial wilt
HOST: Geranium
Geranium with stem rot and wilt.
Bacterial wilt | Geranium
DISEASE: Bacterial wilt
HOST: Geranium (Pelargonium sp.)
PATHOGEN: Ralstonia solanacearum
PATHOGEN SYNONYM: Pseudomonas solanacearum
SOURCE: M. Daughtrey
DISEASE: Bacterial wilt
HOST: Geranium
Rot and browning of diseased stems.
Bacterial wilt | Geranium
DISEASE: Bacterial wilt
HOST: Geranium (Pelargonium sp.)
PATHOGEN: Ralstonia solanacearum
PATHOGEN SYNONYM: Pseudomonas solanacearum
SOURCE: M. Daughtrey
DISEASE: Greasy center
HOST: Poinsettia
Stem with dark cankers and copious ooze. Necrotic areas are greasy in appearance and eventually turn light tan to brown with a papery texture as the cuticle becomes detached.
Greasy center | Poinsettia
DISEASE: Greasy center
HOST: Poinsettia (Euphorbia pulcherrima)
PATHOGEN: Pseudomonas viridiflava
SOURCE: R. Raabe