Abstract: Two maize inbreds (B-73 and MO-17) and their hybrid (YHS-202) were subjected to NaCI salinity induced at four growth stages in a pot experiment during 1998. It comprised of three salinity treatments viz. 10, 15 and 20 dSm–1 alongwith control having normal field soil (EC 2.5 dSm–1). A progressive decrease occurred in all parameters with increasing salinity levels. Grain yield was reduced by 22 percent at 20 dSm–1 as compared with control. Salinity affected all the genotypes but MO-17 proved comparatively better than other two. Deterioration was caused by salinity at all growth stages but it was more pronounced at earlier than later growth stages.