Rice (Oryza sativa)
Rice Bug (Leptocorisa acuta)
Symptoms
- Attack of rice bug is seen in the early ear bearing stage.
- They suck the sap from grains. The attacked grains show brownish discoloured patches on the husk.
- Some grains or ear heads appear chaffy.
- The panicles will be seen standing erect because of low weight.
- Bugs can be seen flying about when disturbed.
- The bug also emits a particular buggy odour. Brownish green adults are slender with long legs and antennae.
Management
- Spray fish jaggery extract (20 ml/ litre of water).
- Spray neem seed kernel extract (50 gram/litre of water) or notchi leaf extract (100 gram/litre of water) or Ipomoea leaf powder extract (100 gram/litre of water) or Prosopis leaf powder extract (100 gram/litre of water).
- Spray chitin based Pseudomonas fluorescens (2.5 kg/ha).
- Strict vigilance is necessary at milky stage.
- Keep the field and bunds free of weeds and grasses.
- Avoid overlapping cultivation in an area.
Chemical Control
| Sl.No | Generic Name | Trade Name | Color code | Dosage/litre | Knapsack Sprayer (Capacity 10L) | Dosage/acre (200 L) | Dosage/hectare (500 L) | Remarks |
|---|---|---|---|---|---|---|---|---|
| 1 | Malathion 50 EC | Agromala, Agromala Malathion, Celthion, Hilmala, Kthion, Malaacid, Simala Milthion, Tagthion Malamar, Thisol | Blue | 2 ml/ litre of water | 20 ml | 400 ml | 1000 ml | Ensure the time of spray either before 9 am or after 3 pm and it should be spiral manner, beginning at the field bunds and progressing towards the field center. |
Extremely Toxic
Highly Toxic
Moderately Toxic
