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Guru GyaanAgroStar Agronomy Centre of Excellence
Integrated Management of Rice stem borer (IPM)
• The incidence is more under warm weather condition. • Larva enters into the plant near the internode by making a hole and feed inside. • The main shoot is dried of over a time and it is called as “Dead heart”. • If infestation is observed after the emergence of panicle, it turn into white colour and grains do not fill up which is known as “White ear”. • Such damaged dead hearts or white ears are easily pulled out. • Rice varieties such as Narmda, GR 102, IR 22, IR 66, Gurjari, CR 138-928 and GR 12 are resistant varieties, select resistant varieties. • Transplant paddy seedlings during the first fortnight of July. • Apply recommended nitrogenous fertilizers in a split dose. • Instead of using urea, use ammonium sulphate fertilizer to reduce the infestation. • Apply chlorantraniliprole 0.4 GR or carbofuran 3G or cartap hydrochloride 4G or fipronil 0.3 GR @ 1 kg per 100 sq. m. area of rice nursery at 15 days after seeding. Mix with the sand and broadcast in the nursery. • Cut the tips of seedling before transplanting. • As the larvae hiding in the stem, the granular insecticides remains more effective. • To attract the adults of pest, install pheromone traps. • If possible, also install one light trap in rice field. • Preventive measures should be taken when the infestation of this pest is 10% before the emergence of panicles and 5% after emergence of panicles. • Apply chlorantraniliprole 0.4 GR or cartap hydrochloride 4G @ 10 kg or fipronil 0.3 GR @ 20-25 kg per hectare two times, first on initiation of pest or 30-35 days after transplanting and second at 15-20 days after first application in rice field. • Apply these granules only in the infested area. • In addition, spray chlorantraniliprole 18.5 SC @ 3 ml or flubendiamide 20 WG @ 2.5 g or fipronil 80 WG @ 1 g or flubendiamide 4% + buprofezin 20% SC @ 10 ml per 10 lit of water. • Prompt disposal of paddy stubbles just after the harvesting of the crop.
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