Z. Rankova1*, M. Tityanov2 1Fruit Growing Institute, 4004 Plovdiv, 12 Ostromila, Bulgaria 2University of Forestry, 10 Kliment Ohridski, 1756 Sofia, Bulgaria (Manuscript received 31 May 2016; accepted for publication 26 July 2016) Abstract. The study was carried out in the period 2010

C. Melucă, N. Pîrvu, T. Nistor, R. Sturzu, A. Stoilova Abstract. Certain experiments with sunflower hybrids realized through Sulfo technology, resistant to tribenuron methyl 75% based herbicides were performed at Agricultural Research and Development Station(ARDS)Teleorman, Romania. T