Abstract
The conducted research was aimed at studying new systems of weed plants control during cultivation of oil flax. We carried out the field studies in the south of Russia in the Krasnodar region on leached chernozem during 3 years. We found that the application of preemergent herbicides Frontier Optima, EC (1.2 l/ha) and Dual Gold, EC (1.6 l/ha) provides an efficient weed control, contributes to higher crop productivity and cost-effectiveness indicators compared to the used in the production method of spraying vegetative plants with a tank mixture of herbicides. The application of preemergent herbicides will increase the competitiveness of oil flax cultivation and help receiving good economic effect. The herbicide Gardo Gold, SC (4.0 l/ha) and a tank mixture of herbicides Dual Gold, EC (1.6 l/ha) + Gezagard, SC (3.5 l/ha) are not recommended for application on oil flax due to the phytotoxic effect on the crop, which decreases the yield and oil content of seeds.
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