Agronomic and economic aspects of fungicide protection of winter common wheat variety Tanya

The winter common wheat variety Tanya was included in the State Register of Agricultural Varieties and Hybrids approved for use in the Russian Federation in 2005. It is one of the most popular and widely used varieties in production. A significant advantage of this variety is its moderate susceptibility to a range of foliar diseases during the vegetation period. The purpose of the current study was to provide an agronomic and economic estimation of the efficiency of fungicide protection for the variety Tanya, depending on the agricultural background. There has been analyzed productivity development based on the contribution of yield structure elements depending on the option of fungicide protection. There has been established that, under high agricultural conditions, the maximum average productivity of the variety over seven years (90.6 hwt/ha), which was on 4.8 hwt/ha more than that of the control variant was formed with double protection with fungicides. Smaller yield increases were achieved with fungicide application during a booting stage, and in the period of flag leaf formation with 88.3 hwt/ha and 87.8 hwt/ha, respectively. The highest net income of 99, 930 rubles/ha was achieved with double protection, while the lowest of 98,440 rubles/ha was achieved with the control variant, although the control variant had the highest profitability of 226.7%. With double protection, there was the lowest profitability of 202.3%. Fungicide application to the variety Tanya sown after row crops without nitrogen fertilization was unreliable, within the НСР 05 range, reducing productivity and worsening economic indices.