Control of airborne infections of wheat

Leaf-stem infections damage the wheat crop. Puccinia recondite and Blumeria graminis are especially harmful. There were outbreaks of septoriosis and pyrenophoresis (Stagonosopra nodorum, Pyrenophora tritici-repentis) and linear rust (Puccinia graminis). The lack of spring wheat crops and deterioration in the grain quality caused by epiphytoties is 25-50%. An effective method for controlling aerogenic infections is the use of fungicides. Studies on the effectiveness and feasibility of fungicidal protection of wheat against pathogens were carried out in Kurgan region. It is economically feasible to use Bacillus subtilis-based substances to prevent wheat infections. In case of a moderate wheat damage, it is recommended to use tank mixes (1/2 of systemic fungicide + hay-bacillus-based biofungicide). In case of mass development of leaf-stem infections, it is necessary to protect the crops using systemic fungicides if there is primary infection of a lower tier of leaves and weather conditions are favorable for pathogens. The use of fungicides preserved more than 30% of the wheat crops and improved the quality of grain. Profitability of chemical protection options increassed by 20-26 %.