15. Efficacy of herbicides for control of broadleaf weeds in winter wheat (Triticum aestivum l.)

During the vegetation season of 2017-2018 a field trail 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. Quelex® (halauxifen-methyl + florasulam) – 3,75 g/da; 3. Quelex® – 5 g/da; 4. Quelex® – 3,75 g/da + Dasoil (adjuvant) – 100 ml/da; 5. Quelex® 5 g/da + Dasoil – 100 ml/da; 6. Derby® Super (aminopyralid-potassium + florasulam) – 2,5 g/da; 7. Derby® Super – 3,3 g/da; 8. Derby® Super – 2,5 g/da + Dasoil – 100 ml/da; 9. Derby® Super – 3,3 g/da + Dasoil – 100 ml/da; 10. Starane® Gold (florasulam + fluroxypyr) 120 ml/da; 11. Starane® Gold – 150 ml/da; 12. Starane® Gold – 180 ml/da; 13. Biathlon® 4 D (tritosulfuron + florasulam) – 5 g/da; 14. Sekator® OD (amidosulfuron + iodosulfuron) – 10 ml/da; 15. Mustang® SC (2,4 D ester + florasulam) – 60 ml/da.

The efficacy of the studied herbicide products by the 10 score scale of EWRS was recorded. The results were compared with untreated control. The herbicide selectivity for the winter wheat by the 9 score scale for phytotoxicity of EWRS was reported. The highest herbicide efficacy (95 – 100%) against the existing weeds and the highest yield (702,21 kg/da) were obtained at the variant treated with Mustang® SC.

The aim of the study is to determine efficacy of herbicides for control of broadleaf weeds in winter wheat.