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GrainGenes Pathology Report: Bacterial Leaf Blight

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Pathology
Bacterial Leaf Blight
Type
Bacterium
Host Species
Triticum aestivum
[ Show all 6 ]
Causal Organism
Pseudomonas syringae pv. syringae
Symptoms
Caused by a common bacterium that persists in soil and water, and spread by wind-driven rains. Bacterial leaf blight develops on upper leaves of wheat during periods of wet weather, high humidity and air temperatures of 60-78 F after plants have reached the boot stage. Initial lesions appear as small water-soaked spots. Lesions expand and become necrotic. Spots often coalesce in a few days to form large blotches. Entire area of an infected leaf may be affected. Head tissue usually does not develop symptoms. Bacteria leaf blight can also attack corn and grain sorghum.
Image
Lesions typical of those produced on wheat...
Reference
ReferenceKephart KD (1993) Winter wheat disease management Insect and plant disease management handbook.
Reference(1987) Compendium of wheat diseases.