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Stem Rust: Puccinia graminis tritici

Symptom :

  • Pustules (containing masses of urediospores) are dark reddish brown - occur on both sides of the leaves, on the stems, and on the spikes
  • Pustules are usually separate and scattered, heavy infections -coalesce
  • Prior to pustule formation, "flecks" may appear. Before the spore masses break through the epidermis, the infection sites feel rough to the touch
  • As the spore masses break through, the surface tissues take on a ragged and torn appearance
  • Survival : Both survive on stubbles and volunteer crops
  • Alternate host : Berberis spp.
  • Spread : uredospores from hills
Identification of pathogen:

Management:

Management: Mixed cropping and crop rotation Avoid excess nitrogen Sulphur dusting @ 35-40 kg/ha Mancozeb @ 2g/lit Resistant varieties Lerma Rojo, Safed Lerma, Sonalika and Chotil
Source of Microscopic images: Diseases of small grain cereal crops- A colour handbook by TD Murray, DW Parry and ND Cattlin
  • Mixed cropping and crop rotation
  • Avoid excess nitrogen
  • Sulphur dusting @ 35-40 kg/ha
  • Mancozeb @ 2g/lit
  • Resistant varieties Lerma Rojo, Safed Lerma, Sonalika and Chotil
  • Lerma Rojo, Safed Lerma,
  • Sonalika and Chotil
Urediniospores of Puccinia graminis tritci
Teliospores of Puccinia graminis tritci