Performance of genotypes against pod borers in pigeonpea (Cajanus cajan (L.)
M Sreekanth, S Rajamani, Y Koteswararao and MV Ramana
Among the twelve germplasm lines the genotypes, WRG 79 and LRG 41 (local check) with 3.3 and 3.5 per cent pod damage respectively due to gram pod borer, Helicoverpa armigera were categorized as moderately resistant with pest susceptibility rating (PSR) 4; and the genotypes, RVSA 68 and RVSA 81 with 2.7 and 3.6 per cent pod damage due to spotted pod borer, Maruca vitrata respectively were categorized as moderately resistant with PSR 3 and 4, respectively. All the genotypes evaluated were under susceptible category against pod fly, Melanagromyza obtusa with PSR ranging from 6 to 9. However, the national check, BSMR 853 has recorded highest yield (771.0 kg/ha), followed by WRG 65 (702.7 kg/ha). Similarly, under preliminary varietal trial, the genotype, ICPL 98008 with 0.9 per cent pod damage due to Helicoverpa was moderately resistant with pest susceptibility rating (PSR) of 4. The genotypes, JSA 68 and SKNP 203 with 0.9 and 0.5 per cent pod damage respectively were categorized as resistant with PSR of 2; and the genotypes CORG 990015 and ICPL 98008 with 2.7 and 3.3 per cent pod damage respectively were categorized as moderately resistant with PSR of 3 and 4, respectively against Maruca. There was no significant difference among the genotypes against pod damage caused due to pod fly. The genotypes, MAL 29, followed by AKT 222544, ICPL 98008 and SKNP 203 with 813.7, 808.3, 757.0 and 727.7 kg/ha, respectively were highly productive.