With the purpose of verifying if the irrigation system affects the corn (Zea mays L.) yield components and the seed quality, a field experiment was carried out using furrow and sprinkler irrigation, at Agricultural Department, University of São Paulo, in Piracicaba-SP, Brazil, with the double hybrid BR 201. The plant nutrition, and pest and weed control were optimized. There was no fungicide application. The irrigation system was used to apply the accumulated maximum evapo(trans)piration, computed by Pan Evaporation Method, each four days. The leaf area and leaf damage were evaluated at fenologic stage six using computerized image analysis technique (SIARQS). At the harvest time, the number of spikes, plant population and yield seeds were determined. The physiologic quality (first germination count, germination, cold test, accelerated aging, field emergence test and electric conductivity) and seed health (paper filter method) of seeds was evaluated immediately after the crop and drying of the seeds, and after 180 days of
storage. The sprinkler irrigation system affected negatively the foliar area and it promoted most incidences of foliar diseases. The evaluation of the seeds health permitted to conclude that the sprinkler irrigation system favored the pathogens incidence (Penicilium sp., Fusarium sp., Cephalosporium sp. and Alternaria sp.), with consequent reduction in the germination and in the vigor after the storage. Therefore, the corn seed quality was superior under furrow irrigation system.