Screening and identification of sources of resistance against corn leaf aphid (Rhopalosiphum maidis Fitch.) in barley

Resistance against aphids is critical trait for the stability and sustainability of barley production. Very few sources of resistance are available against corn leaf aphid in India. Thus, a large collection of accessions acquired from Directorate of Wheat Research, Karnal under a Network Project on barley germplasm evaluation was screened against corn leaf aphid in Punjab. The studies indicated that a few accessions are found resistant consistently (BCU 2806), few for three years (BK-9816 and CIHO 6264) and many for two years (BCU 323, BCU 4507, EC 492255, EC 492253, EC 492350 and IC 437880). These genotypes could be used as donor for incorporation of aphid resistance in elite barley genotypes.