Published in Scientific Papers. Series A. Agronomy, Vol. LXI, Issue 2
Written by Anyo MITKOV, Mariyan YANEV, Nesho NESHEV, Tonyo TONEV
The aim of the study is to evaluate the efficacy of the herbicide products Gardoprim® Plus Gold 550 SC (312.5 g/l smetolachlor + 187.5 g/l terbuthylazine) and Spectrum® 720 EC (720 g/l dimethenamid-p) in low rates. The field trial was conducted in 2016 and 2017 with the conventional sunflower hybrid P64 LL 125. The experiment was stated in the experimental field of the base for training and implementation of the Agricultural University of Plovdiv, Bulgaria. The trial was conducted by the randomised block design in 4 replications, and the efficacy was recorded by the 10 score visual scale of EWRS. The usage of tank mixtures of both studied herbicides lead to increased efficacy against some dicotyledonous weeds as Solanum nigrum L., Abutilon theophrasti L. and Amaranthus retroflexus L. Average for the period, for the treatments with Gardoprim® Plus Gold 550 SC in rate of 4000 ml ha-1 and the tank mixture of the herbicides the highest seed yields are recorded - 2.00 and 1.90 t ha-1, respectively.
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