BIOPREPARATION INFLUENCE ON YIELD CAPACITY OF BLACK CURRANT IN THE VOLGA REGION FOREST STEPPE

The main objective of this research is the studying of efficiency of biopreparations usage and their influence on the yield capacity of black currant. The researches were carried out on the experimental field of department of fruit and berry crops of the Ulyanovsk Agricultural Scientific Research Institute. We investigated two species of black currant – Zelenaya dymka and Elevesta. The species have been planted in two variants: using of Gumi biopreparation when planting (soaking of root system for 12 hours) and further, during vegetation, the soil dressing and variant without using of Gumi biopreparation. The processing during vegetation included five options: 1. Control, 2. Mospilan (0,3 kg/hectare) + Phytosporin (0,5 kg/hectare), 3. Phytoverm (2,0 l/hectare) + Topaz (1,0 l/hectare), 4. Phytosporin (0,5 kg/hectare) + Actellic (1,5 l/hectare), 5. Mospilan (0,3 kg/hectare) + Topaz (1,0 l/hectare). The studying of biopreparations influence was carried out within three years, since third year of plant life.