author(s)
Irham Rasool, Meinaz nissar, AR Wani and RK Nehru

abstract
Spotted stem borer, Chilo partellus (Swinhoe) is the most important pest of maize in Kashmir and host plant resistance is an important component for controlling this pest under subsistence farming conditions. Therefore, a study was carried out to identify sources of resistance in various locally used genotypes maize for resistance and to determine antibiotic influence (mortality percentage) of identified resistant genotypes on larvae of stem borer in maize under laboratory conditions. Twenty four maize genotypes were screened against maize stem borer (C. partellus) and entire screening was based on Leaf Damage Score (LDS), dead heart formation and tunnel length. Among all the genotypes screened CM- 133 and CM-123 were highly resistant, KDM-895A, KDM-381A, KDM-362B and KDM-402 were found resistant. KDM-340A, KDM-361 and KDM-935A were highly susceptible and Basi-local was observed extremely susceptible. Larval mortality was observed highest in genotypes CM-133 and CM-123 as compared to KDM-895A, KDM-381, KDM-362B and KDM-402. However, least larval per cent mortality was observed in highly susceptible check Basi-local. Field screening and Per cent larval mortality in laboratory indicated that there is considerable diversity in maize genotypes for antibiosis component of resistance to C. partellus. Genotypes placed in different groups, and showing antibiosis to C. partellus can be used in resistance breeding programs to diversify the basis of resistance to this pest.