A two-year field study was conducted at El-Ismailiya Agricultural Research Station to evaluate the fungicides Bellis and Micronized Sulphur, applied as foliar sprays, for control of powdery mildew on six flax cultivars (Giza 9, Giza 10, Sakha 3, Sakha 4, Istro, and Jiteka) with varying levels of susceptibility to the disease. Disease severity, agronomic traits, and technological traits were used as criteria for evaluating the performance of the tested fungicides. Bellis and sulphur were effective in controlling the disease (reducing the disease severity) in 2011 and 2012 on all the tested cultivars; however, efficiency of the fungicides (magnitude of reduction in the disease severity) in controlling the disease differed from one cultivar to another and from year to year. Bellis did not contribute to significant increases in many agronomic and technological traits of the tested cultivars in 2011 and 2012, while sulphur significantly improved, with few exceptions, almost all the tested traits. In conclusion, the present study demonstrated that both Bellis and sulphur were effective in reducing the disease severity; however, sulphur surpassed Bellis in improving agronomic and technological traits. Therefore, sulphur is better choice than Bellis for controlling the disease.