Antibiosis resistance in various wheat varieties against wheat aphid (Rhopalosiphum padi l)

Nine wheat varieties (viz., NIAW301, NIAW 917, NIAW 1415, NIAW 34, NIAW 1994, NIAW5439, LOK-1, GW 496, NIDW 295 and A-9-30-1) were screened against wheat aphid (Rhopalosiphum padi L) at Agricultural Research Station, Niphad Dist. Nasik during rabi season of 2016–17. Seedling bulk and antibiosis tests were carried out for resistant, moderately resistant and susceptible varieties. The result revealed that the varieties NIAW 917, NIAW 301, NIAW 34 and NIAW 1994 were moderately resistant; varieties NIAW1415, NIAW5439 and Lok-1were moderately susceptible while A-9-30-1, NIDW 295 and GW 496 were susceptible as revealed during seedling bulk test. During antibiosis study, the varieties A-9-30-1, NIDW 295, GW 496, NIAW 34 and NIAW 5439 were found to be highly preferred for fecundity, while, NIAW 917 and NIAW 1994 were least preferred, whereas, NIAW 301, NIAW 1415, and LOK-1 were moderately preferred.