Broomrape (O. cernua) is one of the most serious hindrances in sun flower production throughout Turkey and East Europe. Previous and recent studies have shown that imidazolinone (IMI) herbicides applied on Imida zolinone-resistant sunflowers effectively control O. cernua by rapid absorbtion, translocation and accumulation in the root-attached parasite. However, sus ceptibility level of susceptible sunflower cultivars to herbicides has been an obstacle in the application of these herbicides. Preliminary studies have been conducted with susceptible sunflower cultivars. Best results were obtained with a single foliar treatment with Imazamox (35 g/l) + imazapyr (15 g/l), 43.75+18.75 g/ha was applied on imidazolinone-resistant sunflower plants at 8-10 true leaf stage. The treatment caused serious damage to susceptible sun flower plants but no damage was observed on IMI resistant cultivars since they completely controlled O. cernua, resulting in a significant increase in sun flower seed yield over the non-treated control. In addition, the same treatment controlled key weeds that seriously affect sunflower production. Broomrape (O.cernua) and weeds have infested sunflowers and significantly reduced yield in the observed sunflower production area. But, use of IMI resistant and broomrape tolerant hybrids has effectively suppressed and decreased weed population and epidemics in recent years.