Abstarct: The implementation of an Integrated Weed Management (IWM) system is seen by many weed scientists as a means of achieving the goal of reducing herbicides use while still maintaining crop yield. In order to study of the effect of Integrated Weed Management (IWM) emphasizing on priming on yield and yield components of corn (Zea mays L.) an experiment was carried out as Randomized Complete Block Design (RCBD) with four replications at the Research Farm of the Faculty of Agriculture Shahrood University of Technology in 2011. The treatments included check (weedy at all season), herbicide in regular dosage (Nicosulfuron 2 lit/ha), reduced herbicide (nikosolforon 1 lit/ha), hand weeding at all growth season, hand weeding up to 3 and 6 weeks after emergence, reduced herbicide+hand weeding up to 6 weeks after emergence, hydropriming, hydropriming+reduced herbicide, hydropriming+hand weeding up to 6 weeks after emergence. Results showed that hydropriming+hand weeding at 6 weeks after emergence and hydropriming+ reduced herbicide and reduced herbicide+ hand weeding up to 6 weeks after emergence reduced weed density and weed dry weight as well as Nicosulfuron herbiside in regular dosage. There were not significantly difference between IWM treatments, hand weeding at all growth season and Nicosulfuron herbiside in regular dosage treatments for 100-seed weight trait. Treatments emphasized on priming produced maximum biological yield. There was not significantly difference between hand weeding at all growth season treatment, hydropriming+ reduced herbicide and hydropriming+hand weeding up to 6 weeks after emergence and Nicosulfuron herbiside in regular dosage for grain yield trait. Grain yield for check (weedy at all season) treatment was 39.9 percent less than hand weeding at all growth season treatment. Generally, IWM emphasized on priming reduced weed density and weed dry weight and produced grain yield equal with hand weeding at all growth season treatment and Nicosulfuron herbiside in regular dosage treatment.