author(s)
S Akshay Kiran, A Padmasri, B Anil Kumar and M Madhavi

abstract
The present investigation was carried out at Seed Research and Technology Centre, PJTSAU, Rajendranagar, Hyderabad during 2019-2020. The laboratory experiment was conducted with 3 replications in CRD design under controlled conditions. Varietal screening studies were carried out with 25 rice genotypes and performance of them were assessed based on various biological parameters, damage and infestation by Sitophilus oryzae. Index of susceptibility (IS) was taken as criteria for assessing the resistance or susceptibility of selected genotypes to S. oryzae. As per the results obtained, none of the genotypes were found resistant to the weevil attack. However, eight genotypes with less IS viz., JGL 3844 (2.53), MTU 1001 (3.16), RNR 2458 (3.21), JGL 1798 (3.26), MTU 1010 (3.29), MTU 7029 (3.37), KNM 118 (4.37) and RDR 7555 (4.64) were categorized as moderately resistant. While JGL 11118 (7.96) with high IS was found susceptible and the rest of genotypes were categorized as moderately susceptible.