Published in Scientific Papers. Series A. Agronomy, Vol. LXVI, Issue 1
Written by Tanko KOLEV, Zhivko TODOROV
In 2018-2021, the following retardants were tested at the Experimental and Experimental Base of the Agricultural University of Plovdiv, Bulgaria: Medax Top (1000 ml/ha); Baya (1500 ml/ha) and Bogotá (2500 ml/ha). The treatment of Durum wheat (Desf.) variety Saya was carried out in phenological phase BBCH 30-39. It was found that the highest grain yield was obtained when the durum wheat variety Saya was treated with the Medax Top retardant (1000 ml/ha), with an average of 4.632 t/ha or 9.0 % more than the water control over the three-year period. In second place is the Bogota retardant (2500 ml/ha) with a grain yield of 4.507 t/ha or 6.0%, followed by the Bayja 1500 ml/ha retardant with a yield of 4.410 t/ha or 3.7% more than the control.
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