Evaluation of sesame genotypes for their relative resistance against leaf webber and capsule borer, Antigastra catalaunalis Duponchel (Crambidae: Lepidoptera)

Abstract

Investigation on evaluation of sesame genotypes for their relative resistance against leaf webber and capsule borer, Antigastra catalaunalis (Crambidae: Lepidoptera) was conducted at RARS, Jagtial during summer, 2020. A total of 68 sesame genotypes including TKG-22 (resistance check) and Swetha thil (susceptible check) were evaluated for their relative resistance/susceptibility. The intensity of leaf damage at 30 DAS is ranged from 5.00% (FFAT-10-5) to 25.00% (FFAT-142) whereas the mean leaf damage, 2.20% and 22.00% was found in resistant (TKG 22) and susceptible checks (Swetha thil), respectively. The mean percent flower damage at 50 DAS was recorded between 5.50% (JCS 3886 and JCS 4120) to 22.50% (FFAT-142 and JCS-3899) as against 4.50% and 19.00% in resistant (TKG-22) and susceptible (Swetha thil) checks respectively. The average percent capsule damage at 70 DAS is ranged from 2.75% (SI-225) to 9.00% (JCS 3603, JCS 3596 and JCS 4096) whereas, the mean capsule damage of 3.00% and 9.50% was recorded in resistant (TKG-22) and susceptible (Swetha thil) checks respectively. The sesame genotypes were categorized as highly resistant (HR), resistant (R), moderately resistant (MR), susceptible (S) and highly susceptible (HS) based on the cumulative score (0-9) and grade (1-9) of the individual genotype. Among 68 genotypes a total of 10 genotypes viz., IC-14120-1, SI-225, Jagtiala til-1, JCS 3980, JCS 3981, JCS 4053, JCS 3886, JCS 4120, YLM 11 and YLM 66 were showed less susceptibility to A. catalaunalis. These germplasm lines might be exploited in hybridization programme for development of the resistant cultivars.