Radish (Raphanus sativus)
Aphids (Myzus persicae, Brevicoryne brassicae, Lipaphis erysimi)
Symptoms
- The pest attacks both the seedlings as well as the mature crop.
- The nymphs and adults suck the cell sap and devitalize plants.
- Affected parts become discolored and malformed.
- High humidity favours rapid multiplication of this pest.
- The aphids are mostly observed on the lower surface of the leaves.
Management
- Applying water with high pressure helps reduce the pest.
- Hang yellow sticky (castor oil coated) traps @ 20 no/ha.
- Spray Lecanicillium lecanii (synonym Verticillium lecanii ) (20 g/litre of water) or Beauveria bassiana (20 g/litre of water).
- Spray neem garlic emulsion (20 ml neem oil + 20 gram garlic paste + 5 gram bar soap/litre of water).
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 | Malathion 50 EC | Agromala, Thisol, Agromala Malathion, Simala Milthion, Kthion, Hilmala, Malaacid, Tagthion Malamar, Celthion | Green | 1 ml/ litre of water | 10 ml | 200 ml | 500 ml | - |
Extremely Toxic
Highly Toxic
Moderately Toxic
