Cabbage (Brassica oleracea var. capitata)
White rust (Albugo candida)
Symptoms
- Disease attacks the leaves and flowering shoots.
- White mildew fungal structures in patches and blisters are observed on the under surface of the leaves.
- The inflorescence may become enormously thickened, fleshy and greenish leading to sterility.
- The thickened inflorescence is generally known as stag head.
- Blisters after rupturing the host epidermis release white powdery mass comprising of sporangia.
Management
- Follow field sanitation.
- Use resistant varieties.
- Collection and burning of diseased plant material in order to prevent oospore formation.
- Reduction of humid conditions around the plants by maintaining proper spacing
- Weed free cultivation.
- Application of fertilizers like phosphorus, potassium and avoidance of excess application of nitrogen keep the disease under check.
Chemical Control
| Sl.No | Generic Name | Trade Name | Color code | Dosage/litre | Knapsack Sprayer (Capacity 10L) | Recommendation | Remarks | |
|---|---|---|---|---|---|---|---|---|
| Dosage/acre (200 L) | Dosage/hectare (500 L) | |||||||
| 1 | Potassium phosphonate 40 SC | Akomin | Green | 4 ml/litre of water | 40 ml | 800 ml | 2000 ml | - |
| 2 | Mancozeb 75 WP | Devidayal M-45, Dhanuka M 45, Dhanuka M-45, Dithane, Dithane M-45, Hilthane, Hindustan M 45, Indofil M 45, Izeb M-45 Manzate, Luzen-45, Macoban, Macoban M-45, Mancosaan, Mancosaan M-45, Maneb Manzane, M-Guard, Savour M 45, Tata M-45 Eurofil-NT, Uthane M-45, Veera, Zinthane | Green | 3 g/litre of water | 30 g | 600 g | 1500 g | - |
Extremely Toxic
Highly Toxic
Moderately Toxic
