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In 2017 and 2018 is displayed on at temp by block method with 9 herbicides in the experimental field of the Institute of maize in Knezha. The study is performed with a maize hybrid Knezha 613 – group 500-600 by FAO, cultivated without irrigation. Five systems of herbicides were studied, which includes five soil preparations: Adengo 465SC (isoxaflutole + tiencarbazon-metil) at a dose 35 ml/da; Merlin Flex 480SC (isoxaflutole) at a dose 42 ml/da; Spectrum (dimetenamid-P) at a dose 140 ml/da; Gardoprim plus gold (S-metolachlor + terbutilazin) at a dose 450 ml/da and Dual gold 960EK (S-metolaclor) at a dose 150 ml/da. The study includes also 4 foliar preparations, applied in a phase fourth-fifths leaf of the crop, after the soil products: Elumis (nicosulfuron + mezotrion) at a dose 200 ml/da; Aminopielic 600SL (2,4-D) at a dose 120 ml/da; Lumax (S-metolachlor + terbutilazin + mezotrion) at a dose 300 ml/da; Maton 600EK (2,4-D-ester) at a dose 110 ml/da. Of the tested systems of herbicides with highest efficacy is the system of Dual gold 960EK + Elumis, which reduced the sensitive weeds with 96,6%.

Effectiveness of systems of herbicides in maize cultivated at conditions of tipical Chernozem