Rust: Puccinia carthami
Symptom
| Symptom Seeding infection causes twisting towards one side. Chestnut brown pustules are formed on hypocotyl leading to collapse of seeding. On older plants girdling and hypertrophy of the stem base may occur. Small, powdery chestnut brown pustules of 1-2 mm in size develop on leaf surface which later turn black. Rust symptoms appear on leaves, flowers and fruits in the form of uredopustules which are brown in colour. In seedling stage initially orange yellow spots appear, later turn to brown to black on cotyledons resulting in drooping and wilting of the seedlings. Management Avoid growing in low-lying areas and flooding under irrigation. Remove and destroy the diseased plants. Do not delay irrigation until the crop exhibits moisture stress symptoms. Destruction of plant debris. One or two sprays of Hexaconazole/propiconazole 1 ml/litre 0.05%) or mancozeb (0.25%) at 15 days interval. Seed treatment with thiram or captan 3g/kg. |
- Seeding infection causes twisting towards one side. Chestnut brown pustules are formed on hypocotyl leading to collapse of seeding.
- On older plants girdling and hypertrophy of the stem base may occur.
- Small, powdery chestnut brown pustules of 1-2 mm in size develop on leaf surface which later turn black.
- Rust symptoms appear on leaves, flowers and fruits in the form of uredopustules which are brown in colour.
- In seedling stage initially orange yellow spots appear, later turn to brown to black on cotyledons resulting in drooping and wilting of the seedlings.
- Avoid growing in low-lying areas and flooding under irrigation.
- Remove and destroy the diseased plants.
- Do not delay irrigation until the crop exhibits moisture stress symptoms.
- Destruction of plant debris.
- One or two sprays of Hexaconazole/propiconazole 1 ml/litre 0.05%) or mancozeb (0.25%) at 15 days interval.
- Seed treatment with thiram or captan 3g/kg.