Screening of fieldbean genotypes for tolerant to aphid (Aphis craccivora)

Abstract

The present study was made to evaluate fieldbean genotype for tolerant against fieldbean aphids. The experiment was conducted during 2017-18, at college of agriculture, IGKV, Raipur, Chhattisgarh. By growing a total of 118 genotype accessions on July, 2017 in an augmented design. It was found that out of 118 fieldbean genotypes, 5 genotype were recorded as a tolerant with overall mean per cent foliage drying between 21-25 per cent, 39 genotype were observed as a moderately tolerant comprised with overall mean infestation between 26-46 per cent infestation, 48 genotype were observed as a susceptible comprised with overall mean foliage drying per cent infestation between 50-64 per cent infestation and 26 genotype were observed as a highly susceptible comprised with overall mean foliage drying per cent infestation between 77-78 per cent infestation. The aphid population was lowest (6.64/cm length around pod) in the tolerant genotypes IS-37, followed by the genotypes IS-56 (6.92/cm length around pod) and IS-78 (7.48/cm length around pod) against aphids, respectively. Highest population was observed in the genotype IS-12 (18.31/cm length around pod) was highly susceptible, followed by the IS-18 (17.77/cm length around pod) and IS-88 (17.74/cm length around pod) against aphids.