Assessment of the varietal preference and resistance against Lipaphis Erysimi (K.) in segregating mustard genotypes under agro-ecological conditions of Peshawar, Pakistan

Abstract

A total of 46 genotypes were screened in the field for susceptibility/resistance to aphids at flowering to pods stage. In preliminary screening 31 lines were selected. Further data were collected for percent (%) infestation and mean number of aphids. Genotypes were grouped as ‘Highly resistant’ ‘Resistant’ ‘Moderate’ ‘Susceptible’ and ‘Highly susceptible’. In percent (%) infestation variation was as genotypes (G7, G28, and G46) < (G1, G27, G31, G35, G36, G37) < (G3, G6, G11, G12, G14, G24, G25, G29, G30, G43) < (G2, G4, G5, G18, G19, G20, G22, G39, G45) < (G9, G10, G21). In mean number of aphid/10 cm of florescence genotype G7, G28 and G46 carried minimum number of 2.22 aphids while genotype G9, G18, G20, G21 and G36 got maximum number of 391.60 aphids..