Effective Combined Fungicide Based on Triazoles and Strobilurin to Protect Spring Wheat from Leafy Phytopathogens

The biological efficacy of the three-component drug Therapevt Pro, suspension concentrate (SC) (cresoxime-methyl 125 g/l + epoxicoazole 125 g/l + diphenoconazole 80 g/l) against the main leafy phytopathogens of spring wheat, as well as its safety for warm-blooded and basic objects of agrocenosis, were evaluated. The study was conducted in 4 regions of the Russian Federation: Leningrad, Kaluga, Saratov and Volgograd regions in spring wheat crops of different varieties and growing conditions. The ecotoxicological assessment was carried out according to 3 main indicators: toxic load, hazard coefficient for bees, as well as the environmental load of fungicides on the soil. The residual amounts of the active substances of the drug Therapevt Pro, SC in the plant material of spring wheat, selected in the Saratov region, were determined according to special methodological guidelines. The expediency of its single application in the norms of 0.6–0.7 l/ha was noted. The effectiveness against brown rust was at the level of 73.3–100, against leaf spotting – 69.9–100, against powdery mildew – 68.5–82.2% varied depending on the duration of action from 20 to 30 days. The safety of using this drug in the above-mentioned regulations has been confirmed during its extensive ecotoxicological assessment.