B.VISHNU*, K. VISWANATH, P. NAGAMANI AND D. BHARATHI

Department of Plant Pathology, ANGRAU-S.V. Agricultural College,Tirupati-517 502.

ABSTRACT

Stem and root rot caused by Macrophomina phaseolina is a devastating disease in sesame. Use of host plant resistance is the cheapest and effective disease management strategy. In the present study, 58 sesame genotypes were evaluated for their resistance against stem and root rot disease in 2025 in a sick field under artificial conditions. The results showed that there was significant difference in Percent Disease incidence (PDI %) of the genotypes tested. The mean disease incidence of genotypes ranged from 5.7 to 59.8 %. Eight genotypes VSP-16 (5.7 %), TPTS-40 (6.6 %), YLM-161 (8.6 %), Nirmala (8.9 %) and VS-16- 009 (9.5 %), Madhavi (9.6 %), GT-10 (9.6) and VS-20-008 (10 %) were found to be resistant (R). These genotypes might be helpful in improving the breeding program of sesame crop. These sesame genotypes can be used for improvement of genetic resistance in already developed lines/varieties or development of new resistant varieties and cultivars through hybridization program.

KEYWORDS: Genotypes, percent disease incidence, resistance.