What is Yellow Rust ?
Yellow rust, also known as stripe rust, is one of the most devastating fungal diseases affecting wheat crops. It is caused by Puccinia striiformis f. sp. tritici and primarily affects the leaves, reducing photosynthesis and grain yield. Bright yellow, elongated pustules arranged in stripes parallel to the leaf veins. Yellow rust can reduce wheat yields by up to 80% in severe cases.
- Type of Infestation: Fungal Disease
- Common Name: Yellow Rust / Stripe rust
- Causal Organism: Puccinia striiformis
- Affected Parts Of the plant: Leaves
Environmental favorable factors for pests/Diseases:
- Cool temperatures: The fungus thrives in cool temperatures, typically between 50-60°F (10-15°C).
- Dense planting: Densely planted crops create a microclimate with reduced air circulation and increased humidity, which favors the fungus.
Symptoms of Yellow Rust in Wheat:
Yellow or Orange Stripes on Leaves:
- Long, narrow streaks of yellow to orange pustules appear along the veins on the upper surfaces of leaves.
Chlorosis and Leaf Drying:
- Infected leaves turn yellow (chlorosis) and dry prematurely, reducing the plant's photosynthetic ability.
Stunted Growth:
- Plants infected early in the season show reduced growth and vigor.
Spike Infection (Severe Cases):
- The fungus may also infect the spikes, affecting grain development and quality.
Measures to control Yellow Rust In Wheat:
| Product | Technical Name | Dosage |
|---|---|---|
| Kzeb | Mancozeb 75% WP | 350 - 400 gm/Acre |
| Dr. Blight | Metalaxyl-M 3.3% + Chlorothalonil 33.1% SC | 300 - 400 ml/Acre |
| Tebusul | Tebuconazole 10% + Sulphur 65% WG | 400 gm/Acre |
| Meta- Manco | Metalaxyl 8% + Mancozeb 64% WP | 1.5 - 2 kg/Ha |
| Boost | Propiconazole 25% EC | 200 - 300 ml/Acre |
| Prodizole | Propiconazole 13.9% + Difenoconazole 13.9% | 1 - 1.5 ml/L |
| Dr. Zole | Azoxystrobin 11% + Tebuconazole 18.3% SC | 300 ml/Acre |
Frequently Asked Questions
Q. What is Yellow Rust In Wheat?
A. It is a fungal disease of wheat that causes yellow or orange stripes on leaves.
Q. What causes Yellow Rust?
A. It is caused by Puccinia striiformis.
Q. What are the symptoms of Yellow Rust?
A. Yellow or orange stripes on leaves, leaf drying, and stunted growth.
Q. Which products are effective for Yellow Rust In Wheat?
A. Products like Kzeb, Dr. Blight, Tebusul, and Boost are effective.
Q. How often should treatment be applied for Yellow Rust?
A. It depends on the weather and severity of the infection, but usually, 2-3 applications are needed.
Q. What is the ideal temperature for Yellow Rust?
A. The disease thrives in temperatures between 50-60°F (10-15°C).
For more information about pests and diseases, read our other blogs.
