Screening of castor germplasm against castor shoot and capsule borer (Conogethes punctiferalis)

The field trial was carried out to screen twenty three castor germplasms against castor shoot and capsule borer Conogethes punctiferalis at S.V. Agricultural College, Tirupati, Acharya N.G. Ranga Agricultural University (ANGRAU) during rabi, 2021-22. The results revealed that none of the genotypes were found resistant. Based on the per cent capsule damage scale, six genotypes viz., ICS-164 (0.26% capsule damage), SKI-215 (0.39%), GC-3 (0.76%), DCS-8g (2.57%), DCS-9 (8.72%) and 48-1 (8.25%) were categorized as tolerant to C. punctiferalis. Six genotypes viz., DCS-107 (12.32%), YTP-1 (12.52%), GC-2 (12.99 %), DCH-519 (15.65%), Haritha (16.31%) and SKI-291 (18.69%) were categorised as moderately tolerant. The germplasm with loose spikes and non-spiny capsules were found resistant.