Wheat Stem RustIdentification & Treatment Guide 2026
Puccinia graminis f. sp. tritici · Family: Pucciniaceae
Wheat stem rust (Puccinia graminis f. sp. tritici) causes reddish-brown pustules on stems, leaf sheaths, and leaves. The Ug99 race is a major global threat. Manage with resistant varieties carrying Sr31+Sr38 or Sr25 genes, early planting, and preventive fungicide sprays of tebuconazole or propiconazole at first sign of pustules.
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criticalWheat Stem Rust
- Affects
- stemsleaf sheathsleavesglumes
- Peak Season
- Warm weather (25-30°C) during stem elongation through grain filling
- Spread Risk
- Fast
- Spread By
- Windborne urediniospores traveling hundreds of kilometers, alternate host (Berberis spp.)
உங்கள் தாவரத்திற்கு Wheat Stem Rust இருப்பதாக நினைக்கிறீர்களா?
ஒரு புகைப்படத்தை பதிவேற்றுங்கள், எங்கள் AI அதை சில நொடிகளில் நோய் கண்டறியும் — சிகிச்சை பரிந்துரைகளுடன்.
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Symptoms: What does Wheat Stem Rust look like?
Visual identification guide — tap each stage for details
Small reddish-brown flecks on stems
Tiny reddish-brown or orange-brown spots appear on stems and leaf sheaths. Spots feel rough when rubbed with fingers.
Raised pustules rupturing through epidermis
Elongated, brick-red to reddish-brown pustules (uredinia) break through the stem surface, releasing masses of powdery urediniospores. Stems feel rough and torn.
Black telia and stem breakage
At season end, pustules darken to black (telia stage). Severely infected stems weaken and lodge (break). Shriveled grain with low test weight.
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