Abstract:
The paper presents a study on the biological effectiveness of two herbicides, having as active ingredient the glyphosate,
against annual and perennial weeds in the field after winter wheat harvest. The experimental variants against the annual
weeds were the following: the Control (1) – no herbicides, the herbicide Glyphogan 480 SL in a dose of 2.0 l/ha, and
the herbicide Superklin 480 SL in the dose of 2.0 and 4.0 l/ha, respectively. The experimental variants against annual
and perennial weeds were the following: the Control (2) – no herbicides, the herbicide Glyphogan 480 SL in a dose of
8.0 l/ha, and the herbicide Superklin 480 SL in the doses of 5.0 and 6.0 l/ha. There were determined 15 weed species on
the experimental plots including two species of annual monocotyledonous weeds, 10 species of dicotyledonous weeds
and 3 species of perennial dicotyledonous weeds. The degree of weed control based on the amount of weeds ranged
from 92.2 to 100% compared with the control variant. The degree of weed control based on the green biomass of weeds
ranged from 75.2 to 100% in all variants. The degree of weed control based on the dry biomass of weeds ranged from
79.0 to 100% in all variants. The studied herbicides showed a high biological effectiveness against annual weeds
ranging from 87 to 100% and against perennial weeds ranging from 84 to 100%.
