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
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Causative agent: Puccinia triticina( P.recondita)


  • pustules are orange-brown in colour, circular to oval in shape and chiefly found scattered on the upper surface of leaves. Colour depends on the freshness of the pustule. Because most spores are produced overnight, pustules are best observed in the morning.
  • Uredia are seen as small, circular orange blisters or pustules on the upper surface of leaves.
  • Uredospore appear mostly on leaves, rarely on leaf sheath and stalk
  • Uredia: always found scattered on leaves, never found in rows or stripes, it brusts out on the upper surface as point (bright orange color), orange colored pustules surrounded by yellow halo.
  • Uredosori brust early and release uredospores
  • Black pustules form as the plant approaches maturity(Telia)
  • Tiny orange lesions may appear on seed heads but no pustule.

Diagnosing leaf rust of wheat | Agriculture and Food

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