Course Content
Common bunt of wheat
Angular leaf spot/ bacterial blight/boll rot/black arm of cotton
Rice tungro virus
Rice grassy stunt virus
Rice ragged stunt virus
Rice yellow dwarf disease
Learn crop diseases and their management with Braimy- B.Sc agriculture
About Lesson

Causative Agent: Xanthomonas oryzae pv. Oryzicola


  • Occurring in some areas during very wet seasons and where high rates of nitrogen fertilizer are used.
  • It causes narrow, dark-greenish, water-soaked, interveinal streaks of various lengths, initially restricted to the leaf blades.
  • The lesions enlarge, turn yellowish-orange to brown (depending on cultivar), and eventually coalesce.
  • BLS is not a systemic disease. its affect only parenchymatus tissue.

  • Bacterial leaf streak may be confused with narrow brown spot.
  • To conform leaf streak lesions are usually thinner than those of narrow brown spot
  • narrow brown spot lesions are not translucent, nor do they produce bacterial ooze.

Fact sheet - Rice bacterial leaf blight (418)

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