Dynamics of disease development in soybean crops of the pripyat variety

Abstract

The article presents the results of studies on the biological effectiveness of two-component and three-component fungicides in protecting sunflower from alternaria, sclerotinia and gray rot.
The biological efficiency of a three -component drug based on the active substances of pidiflometofen, 75 g/l + azoxistrin, 125 g/l + diphenonosol, 125 g/l in a rate of flow rate 1.0 l/ha with two -year use as a result of two -year studies against alternariosis in the “lemon ripe” stage amounted to 68.7–69.7 %,, sclerotiniosis – 81.8–94.9 %, gray rot – 63.4–89.8 %, two -component fungicides based on azoxistobine, 125 g/l + diphenonazole, 125 g/l - 68,2–77.9 %; 81.8–100 %; 81,1–87.8 % and azoxistobine, 200 g/l + cyproponazole, 80 g/l – 60.1–78.7 %; 81.4–81.8 %; 85.7–93.5, respectively. The use of fungicid data made it possible to preserve 3.8–4.9 c/ha.