Screening of the barley germplasm/varieties against barley aphid (Rhopalosiphum maidis) Fitch

One hundred thirty sixvarieties/germplasm (one infector check after 20 varieties) of barley were screened to the susceptibility/resistance to aphid, (Rhopalosiphum maidis) was conducted at the Crop Research Farm, Nawabganj, C.S. Azad University of Agriculture and Technology, Kanpur during rabi season 2018-19. The germplasm viz. The result of screening of various varieties/germplasm of barley against Rhopalosiphum maidisindicate that the least incidence was recorded on barley varieties HUB 262, HUB 263 and RD 2988 having (4.66, 4.33 and 3.64 aphids/shoot). The variety BL 802 and HUB 261 was found moderately resistant with the aphid population was observed (7.86 and 8.66 aphids/shoot). Seven varieties viz. DWRB 186, DWRB 187, Explore, HBL 789, HUB 260, NDB 1680 and NDB 1683 was observed as susceptible and population ranges varies 11 to 20 aphids/shoot. The population of aphid 18.0, 17.33, 16.00, 13.67, 19.30, 19.61 and 20.05 aphids/shoot, respectively. The highest infestation was observed in variety RD 2799(C) having (100.66 aphids/shoot).