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
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| Urediniospores of Puccinia graminis tritci |
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| Teliospores of Puccinia graminis tritci |