Madras Agricultural Journal

Field evaluation of 50 local landraces against paddy yellow stem borer (YSB), Scirpophaga incertulas (Walker) was carried out at the College of Agriculture, V.C. Farm, Mandya during Kharif 2022. The per cent of damage by YSB on different genotypes was evaluated at 30, 60 and 90 days after transplanting (DAT). Based on the mean per cent incidence genotypes were grouped into different resistance categories using the Standard Evaluation System for Rice (SES) developed by IRRI. Results revealed ten genotypes exhibiting resistance with a damage score of 1, while 25 genotypes showed moderate resistance (score 3). Additionally, ten genotypes displayed moderate susceptibility (score 5), and five genotypes were susceptible (score 7) to YSB infestation. Notably, none of the genotypes were classified as highly resistant or highly susceptible. Promising resistant and moderately resistant genotypes, including Chinna Ponni – 5, Jeerige Sanna, Karimundaga, Kyasakki, Kariga Javele, Kari Doddi, Kari Dodi Budda, Laalya, Murkanna Sanna, and Sidda Sanna, were identified, offering potential for incorporation into breeding programs aimed at enhancing YSB resistance in rice cultivars.