Published in Scientific Papers. Series A. Agronomy, Vol. LXIV, Issue 1
Written by Mariyan YANEV
In 2018-2019, on the experimental field of the Agricultural University of Plovdiv, Bulgaria, a field experiment with maize hybrid P1114 was performed. The experiment included the following herbicide treatments: Callam (0.40 kg ha-1) + Kelvin OD (1.00 l ha-1 ) + Dash (1.00 l ha-1), Callam (0.50 kg ha-1) + Kelvin OD (1.25 l ha-1) + Dash (1.25 l ha-1), Callam (0.30 kg ha-1) + Kelvin OD (1.25 l ha-1) + Dash (0.625 l ha-1), Callam (0.30 kg ha-1) + Kelvin OD (1.25 l ha-1), Cambio SL (2.00 l ha-1) + Kelvin OD (1.25 l ha-1) and Arat (0.20 kg ha-1) + Kelvin OD (1.25 l ha-1). The application was done in 4th - 6th true leaf of maize (BBCH 14-16). The dominant weeds on the field were Sorghum halepense (L.) Pers. developed from seeds and rhyzomes, Setaria viridis (L.) P. Beauv., Chenopodium album L., Amaranthus retroflexus L., Xanthium strumarium L., Abutilon theophrasti Medik., Datura stramonium L. and Solanum nigrum L. The nicosulfuron-containing herbicide in combination with other products showed good to excellent efficacy depending on the weed species. For all variants treated whit herbicides 1000 grain weight, hectolitre mass and the yield, were higher and with statistically proved differences in comparison to the untreated control.
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