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

Abstract

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, PAD 2023-80-1-3, PAD 1920-100-2-1-3-3 and PAD 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,
PAD 1920-100-2-1-3-3, PAD 1061-19-2-2, PAD 1973-121-1-2-1-1, PAD 2212-25-1-2, CR 837, HKR 95-131, HKR
95-128, HKR 95-129 and PAD 1966-77-22-1 exhibited resistance to bacterial leaf blight during both the years.
However, only two genotypes viz., PAD 1920-100-2-1-3-3 and PAD 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.