PESTS OF RICE (BORERS AND FOLIAGE FEEDERS) :: Integrated Pest Management in Rice
16. Rice root grub: Arthrodeis sp., (Tenebrionidae: Coleoptera)
A. Cultural method
- Remove / destroy stubbles after harvest and keep the field free from weeds.
- Trim and plaster the bunds of rice field to expose the eggs of grasshoppers and to eliminate the bug breeding in grasses.
- Form the bunds narrow and short to reduce the damage by rodents.
- Use resistant varieties wherever available.
- Provide effective drainage wherever there is problem of BPH.
- Clip the tip of seedlings before transplanting to prevent the carry over of egg masses of rice yellow stem borer from nursery to mainfield.
- Organise synchronized planting wherever possible.
- Leave 30 cm rogue space at every 2.5 m to reduce damage by BPH and rodents.
- Avoid use of excessive nitrogenous fertilizers.
- Use irrigation water judiciously (Alternative wetting and drying reduce BPH and case worm).
- Remove the egg masses of stem borer in the main field.
B. Mechanical methods
- Dig out the rat burrows and destroy the rats and young ones at the beginning of the season.
- Set up light traps to monitor and control pests.
- Set up-bow traps to kill rodents.
C. Biological methods
- Release Trichogramma japonicum twiceon 30 and 37 DAT @ 5 cc/ha/release against stem borer.
- Release Trichogramma chilonis on 37, 44 and 51 DAT (thrice) @ 5 cc/ha/release against leaf folder.
- Release of Platygaster oryzae parasitized galls @ 1 per 10 m2 in the mainfield on 10 DAT against gall midge.
- Set up owl perches to reduce rat damage.
D. Plant products
- Spray neem seed kernel extract 5% (25 kg/ha), neem oil 3% (15 lit/ha) to control brown planthopper.
- Spray botanicals viz., NSKE, Vitex negundo (Notchi), Prosopis juliflora and Ipomoea carnea leaf extract 5% to control earhead bug and black bug.
E. Chemical methods
- In BPH prone area / season avoid use of synthetic pyrethroids, methyl parathion and quinalphos and use recommended chemical at recommended doses.
- Use insecticides based on ETL.
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