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HARATHI, P.N1., RAJA SEKHAR2, P., HARI PRASAD, K.V1., BHASKAR REDDY, B.V2 AND RAVINDRA REDDY, B1
S.V. Agricultural College, Tirupati,1 RegionalAgricultural Research Station2, Tirupati
To develop rice cultivars resistant to Asian rice gall midge, Orseolia oryzae (Wood-Mason) biotype IV, phenotyping of rice cultivars was conducted during 2016-17 under field conditions at ARS, Ragolu. Atotal of 105 lines were screened against Asian rice gall midge. Gallmidge incidence as per cent plant damage and per cent silver shoot damage was recorded at 30 and 50 days after transplanting. None of the entries were found highly resistant to Asian gallmidge at Ragolu. However, the entry RGL 7010 was recorded with per cent plant damage of less than 5 per cent, while most of the entries recorded 100 per cent plant damage. These entries could be used as donor in breeding experiments to develop gall midge tolerant varieties.
KEY WORDS: Phenotyping, Rice gall midge, rice genotypes, Cecidomyiidae, Orseolia oryzae, Oryza sativa.