DISEASE: Fire blight
HOST: Pear
Close-up of bacterial strands on fruit. These strands detach and drift with the wind.
Fire blight | Pear
DISEASE: Fire blight
HOST: Pear (Pyrus communis)
PATHOGEN: Erwinia amylovora
SOURCE: M. Schroth, S. Thomson
DISEASE: Fire blight
HOST: Pear
Cankers on trunk often serve as overwintering sites for the pathogen.
Fire blight | Pear
DISEASE: Fire blight
HOST: Pear (Pyrus communis)
PATHOGEN: Erwinia amylovora
SOURCE: M. Schroth
DISEASE: Fire blight
HOST: Pear
Diseased twig with typical crook neck. Note yellowish orange bacterial ooze.
Fire blight | Pear
DISEASE: Fire blight
HOST: Pear (Pyrus communis)
PATHOGEN: Erwinia amylovora
SOURCE: M. Schroth
DISEASE: Fire blight
HOST: Pear
Blossom blight is first seen as water-soaked spots that rapidly turn brown to black as the disease becomes systemic and progresses down the shoot.
Fire blight | Pear
DISEASE: Fire blight
HOST: Pear (Pyrus communis)
PATHOGEN: Erwinia amylovora
SOURCE: S. Thomson
DISEASE: Gumming disease
HOST: Sugarcane
Symptoms include brownish red streaks on leaves with apical chlorosis. Streaks become necrotic with time. Plants are stunted with reddening of vascular bundles.
Gumming disease | Sugarcane
DISEASE: Gumming disease
HOST: Sugarcane (Saccharum officinarum)
PATHOGEN: Xanthomonas axonopodis pv. vasculorum
PATHOGEN SYNONYM: Xanthomonas campestris pv. vasculorum
SOURCE: APS
DISEASE: Leaf scald
HOST: Sugarcane
Leaf symptoms of chlorosis and white, "pencil-line" streaks.
Leaf scald | Sugarcane
DISEASE: Leaf scald
HOST: Sugarcane (Saccharum officinarum)
PATHOGEN: Xanthomonas albilineans
SOURCE: R. Birch
DISEASE: Leaf scald
HOST: Sugarcane
Early stage of disease with white, "pencil-line" streaks on leaf.
Leaf scald | Sugarcane
DISEASE: Leaf scald
HOST: Sugarcane (Saccharum officinarum)
PATHOGEN: Xanthomonas albilineans
SOURCE: R. Birch
DISEASE: Leaf scald
HOST: Sugarcane
Leaf with brownish necrotic streaks, some reddish.
Leaf scald | Sugarcane
DISEASE: Leaf scald
HOST: Sugarcane (Saccharum officinarum)
PATHOGEN: Xanthomonas albilineans
SOURCE: D. Teakle
DISEASE: Leaf scald
HOST: Sugarcane
Advanced stage of disease with brownish red necrotic streaks covering most of the leaf surface.
Leaf scald | Sugarcane
DISEASE: Leaf scald
HOST: Sugarcane (Saccharum officinarum)
PATHOGEN: Xanthomonas albilineans
SOURCE: S. Schenk