During the vegetation seasons of 2016-2017 and 2017-2018 a field trial with
the winter wheat variety “Enola” was conducted. The study was stated on the
experimental field of the base for training and implementation of the Agricultural
University of Plovdiv, Bulgaria. Variants of the trial were: 1. Untreated control;
2. Derby® Super (150,2 g/kg florasulam + 300,5 g/kg aminopyralid-potassium) –
2,5 g/da; 3. Starane® Gold (100,0 g/l fluroxypyr + 1,0 g/l florasulam) – 150 ml/
da; 4. Biathlon® 4 D (714,0 g/kg tritosulfuron + 54,0 g/kg florasulam) - 5 g/da; 5.
Mustang® SC (300,0 g/l 2,4 D ester + 6,25 g/l florasulam) - 60 ml/da. The herbicides
were applied at phenophase tillering of the crop (ВВСН 29-30). The efficacy of
the studied herbicide products by the 10 score scale of EWRS was recorded. The
herbicide selectivity for the winter wheat by the 9 score scale for phytotoxicity of
EWRS was reported. The highest herbicide efficacy (93 – 95 %) against the oilseed
rape and coriander volunteers and the highest yield (539,20 kg/da) were obtained for the variant treated with Mustang® SC average for both experimental years.
