Stripe Blight of Oats Pseudomonas syringae pv. striafaciens
Light green, water soaked spots appear initially and enlarge to brown stripes often with a thin yellow edge on leaves and sheaths. As the disease progresses, the stripes merge into brown irregularly shaped blotches. The leaves may wither and die, starting from the tip. When stripes form on the boot the florets inside may be stained and rotten. Emerged florets may be mottled brown to white and sterile.
Survives on crop residues and seed.
Spread by raindrop splash, direct contact and aphids or other insects.