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The effect of fungicides used in seed dressing and spraying of barley crops on the reduction of disease development and spreading was studied. Application of fungicide Oplot and Vial Trust contributed to the reduction of barley root rot. Biological effectiveness of Oplot was 78.5 % and of Vial Trust was 81.2 %. Fungicides help to increase plant height and leaf surface index, reducing the development of diseases. Spraying of crops with Kolosal Pro proved to be more effective against leaf diseases of barley. The applied preparations helped to increase the barley yield and to obtain healthier seeds. Spraying of fungicides reduced the infection of seeds with pathogenic fungi by 5 times.
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