Screening of Rice Genotypes for Leaf Folder, Cnaphalocrocis medinalis (Guenee) and Bacterial Leaf Blight, Xanthomonas oryzae pv. oryzae (Ishiyama) Dye

Seventy-four genotypes of different maturity groups of rice were evaluated for identification of resistant sources against rice leaf folder, Cnaphalocrocis medinalis (Guenee) under field and screenhouse conditions during 1999. Forty-seven genotypes in 1998 and 57 genotypes in 1999 were also assessed for resistance against bacterial leaf blight, Xanthomonas oryzae pv. oryzae (Ishiyama) Dye through clip inoculation technique. Only 4 genotypes, namely, HKR 95–130, PAU 2023-80-1-3, PAU 1920-100-2-1-3-3 and PAU 1973-121-1-2-2-1 were found consistently promising in different situations and better than resistant donors against leaf folder whereas 10 genotypes viz., Ajaya, PAU 1920-100-2-1-3-3, PAU 1061-19-2-2, PAU 1973-121-1-2-1-1, PAU 2212-25-1-2, CR 837, HKR 95–131, HKR 95–128, HKR 95–129 and PAU 1966-77-22-1 exhibited resistance to bacterial leaf blight during both the years. However, only two genotypes viz., PAU 1920-100-2-1-3-3 and PAU 1973-121-1-2-1-1 can be used as promising sources of multiple resistance against rice leaf folder and bacterial leaf blight in rice protection breeding programmes.