Screening of soybean genotypes/varieties for resistance and/or tolerance against major insect-pests (kharif 2016 and kharif 2017)

Screening studies in kharif-2016 and kharif-2017 of 51 and 50 genotypes/varieties, respectively was analyzed. During kharif-2016, based on stem tunnelling due to stem fly infestation was below ETL (≤ 26%) in EC 100027 (15.63%), EC 241309 (13.02%), EC 242072 (23.21%), EC 309509 (17.01%), EC 309537 (24.39%), EC 309538 (13.26%) and EC 34057 (24.31%) but less genotypes found Spodoptera litura larvae per meter. Compared to other line, some genotypes i.e., EC 14476 (1462 kg/ha) and EC 383165 (1422 kg/ha) gave reasonably good yield despite showing high infestation of major insects and maturity duration have less than 95 days. Hence, these lines could be considered as tolerant lines. During kharif – 2017, because of unfavorable weather conditions the yield levels in all the genotypes were very less, which did not reflect yield potential. Based on above criteria we have found girdle beetle infestation, genotypes SPC 174, EC-333860, VP-1143, VP-1147, EC-390981, EC 114573, DSB 1, NRC 78, SQL 89 and EC 1619 exhibited no plant damage despite showing infestation symptoms of girdle beetle. Stem tunnelling due to stem fly infestation was below ETL (≤ 26%) in TGX 849-D-13-4 (25.69%) and VP-1147 (19.89%). Genotypes EC 18594 (1218 kg/ha) and JS 20-37 (1416 kg/ha) gave reasonable good yield despite showing low infestation of major insects and maturity duration have less than 95 days.