The research was carried out at a field in Talkalakh region- Al smeka village in Western Area-Homs Province . The research objectives to study the effect of water stress conditions on tow hybrids of Zea mayes L. ( Basel1 and Basel2) during different phonological stages(seedling, vegetative growth, flowering, physiological maturity) and control (no water stress) . Split-plot design with three replications was used.