VARIETAL SCREENING OF RICE FOR RESISTANCE TO STEMBORER, Scirpophaga incertulas (Walker)

G. BALASUBRAMANIAN; M. BALASUBRAMANIAN; S. JAYARAJ and S. VENKATESAN

doi:https://doi.org/10.29321/MAJ.10.A02282

Madras Agricultural Journal

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VARIETAL SCREENING OF RICE FOR RESISTANCE TO STEMBORER, Scirpophaga incertulas (Walker)

Author: G. BALASUBRAMANIAN, M. BALASUBRAMANIAN, S. JAYARAJ and S. VENKATESAN,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 73, Issue: jul-jul,

DOI:https://doi.org/10.29321/MAJ.10.A02282

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Abstract

Among the seventeen entries. screened in two places for their resistance to stem- borer during 1984-85, DPI 1091/1-3, IR 50, Paiyur 1. Sornavazhai, TKM 9 and W 1263 were found to be moderately resistant to stemborer deadhearts (DH) upto 30 DAT and Co 18 upto 50 DAT, while Co 18, Co 21, IR 50, Paiyur 1. SB 13, SB 19 were moderately resistant to white ear (WE) damage, recording a grade of 3 as against grade 9 on Jaya. In the on-farm trial, Paiyur, 1 recorded 5.6% deadhearts and 6.6% white-ears as against 12.3% DH and 18.3% WE on Jays recording,a yield of 4995 kg/ha as against 4070 kg/ha on Jaya under unprotected condition,

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