STUDY OF HARMFULNESS OF SPRING WHEAT FUSARIUM HEAD BLIGHT AT ARTIFICIAL INOCULATION DEPENDING ON THE STAGE OF DEVELOPMENT
Fusarium head blight is a dangerous disease of cereals. The goal of this work is to determine the effect of Fusarium head blight on yield and its elements depending on the stage of spring wheat development. The experiments were conducted in the greenhouse. Artificial inoculation was carried out before flowering, at the stage of beginning of flowering and 6 days after beginning of flowering with a spore suspension of Fusarium culmorum. The fungicide was applied prophylactically one day before inoculation or one day after inoculation. Differences in the course of pathogenesis were identified depending on the stage of the plant development at the moment of inoculation: the maximum reduction of ear grain mass at the flowering stage, the minimum - 6 days after beginning of flowering. The maximum effectiveness of the fungicide was manifested with prophylactic application before wheat flowering.