Comparative evoluation of the herbicide effectiveness in spring barley crops

Abstract

The purpose. Comparative assessment of efficiency of herbicides in sowings of spring barley in conditions of North-East Ukraine. Methods. Field probes with several experiments, analysis of results of biological, economical efficiency of herbicides. For comparison they used benchmark herbicide 2,4-D. Results. Long-term probes with 10 herbicides were carried out. On the average in control the quantity of grasses from millet family, as well as annual and biennial dicotyledons (including weeds) made accordingly 224, 197 and 25 plants/m2. Average crude mass of weeds before harvesting was 428 g/m2. The indicated groups took conforming places in the structure of general biomass of weed component of agrophytocenosis — 18, 26 and 56%. Efficiency of preparations in monitoring separate groups of weeds and their aggregate was shown. In rank order of lowering mass of weeds the first 5 places took the following herbicides Lontrel 300, Granstar Pro 75, Kalibr 75, Prima and Laren Pro 60. It was fixed that increase of yield of spring barley depended not only on biological efficiency of herbicides, but also tolerance of crop to separate preparations. Conclusions. From the point of view of economical efficiency the best herbicides in sowings of spring barley are Prima and Kalibr 75. In sowings with the reduced weediness advantage has herbicide Logran 75 WG. On the fields with quarantine species of Ambrosia artemisifolia L. it is necessary to use highly effective preparation Dialen Super 464 SL, in spite of the fact that it insufficiently tolerant to spring barley.