Promising fungicides for protecting spring rape against seed infection and root rots in the North-West of the Russian Federation

Abstract

The results of studying the effectiveness of new fungicides designed to protect spring rape from seed infection and root rot by treatment of the seed material in natural-climatic conditions of the North-West of the Russian Federation are presented. In recent years, there has been a significant increase in the area sown to spring rape in the region. At the same time, a trend towards deterioration of the crop’s phytosanitary condition has been observed. With the accumulation of the infection, fungicide seed treatment will be increasingly required. Based on the results of the research, it has been determined that the new preparations Tirada, SC (application rate 2.0 and 3.0 l/t), Vitaros, WSC (3.0; 4.0 and 6.0 l/t) and Sinkler, SC (1.3 and 1.6 l/t) are more effective in reducing the seed infection (Alternaria spp. – 86.6–94.9; 93.2–96.6; 91.7–100%, respectively; mold fungi – 86.7–93.4; 90.9–96.6; 73.5–78.6%) and root rot development (four true leaves formation phase – 37.7–56.7; 27.2–52.3; 31.7–72.7%; stemming phase – 13.4–41.2; 17.9–29.0; 17.9–50.4%) than Scarlet, ME and Redut, SC fungicides used in the region. Treatment of the rape seeds with fungicides contributed to the growth of the crop yield, which depending on the preparation and its consumption rate was 3.0–50.0% higher than in the control. The indices of the biological and economic efficiency obtained according to the results of the experiments testify to the significant prospects of using new fungicides in the protection of spring rape from seed and soil infection by treatment of the sowing material in the conditions of the north-western part of Russia.