Effect of systemic fungicides on field germination and overwintering of winter rye variety Yantarnaya

Abstract

The studies to identify efficient agrichemicals for pre-sowing seed treatment and treatment of winter rye crops in the autumn at the tillering stage of the Yantarnaya variety, their influence on economic traits were carried out from 2017 through 2021 at the Ural Federal Agricultural Research Center of the Ural Branch of the Russian Academy of Sciences. Winter rye was sown on trial plots after bare fallow; the plots of 20 m² in four repetitions at the end of August or beginning of September; the sowing rate of 5 million of germinable seeds per hectare. In the experiment 1, the effect of pesticides for pre-sowing seed treatment on field germination was studied. In two-factor experiment 2 (factor A - treatment method: seeds before sowing, crops at the tillering stage, both seeds and crops; factor B - agrichemicals) the effect of agrichemicals on winter hardiness was studied. To evaluate field germination and winter hardiness, 3 stationary plots were established in two adjacent rows 1 meter long. The increase of field germination of winter rye Yantarnaya after pre-sowing seed treatment with pesticides is associated with the peculiarities of the agrichemical action. After using the Stinger Trio seed dresser for seed treatment in a dose of 0.5 L t, the field germination rate was significantly higher than in the control by 11.7%. Significant increase in winter hardiness was obtained after treating crops at the tillering stage, on average by 7.6% for the agrichemicals. After treating crops with Fundazol in a dose of 0.6 kg ha and Strekar in a dose of 2 kg ha, winter hardiness significantly increased by 17.3% and 12.7%, respectively. After pre-sowing seed treatment and combined treatment of seeds and crops, the increase in winter hardiness was unreliable.