INCIDENCE, SEVERITY AND YIELD LOSS OF POWDERY MILDEW DISEASE OF RASPBERRY AND EFFICIENCY OF FUNGICIDES AGAINST IT IN UZBEKISTAN

Like other crops, raspberry plant gets infected by many infectious diseases. Among them, powdery mildew disease causes significant damage. This article outlines the results of the study on the pathogens of powdery mildew disease of raspberry, incidence of diseases on the farms, as well as severity of diseases. Besides, the data on yield loss of this disease and testing of the fungicides against powdery mildew disease of raspberry with active ingredients Flusilazole, Difenoconazole + ciflufenamid and Penconazole have been presented. In this case, fungicides against powdery mildew were used during the emergence of the first flower buds of raspberry and in the periods before flowering. The highest biological efficacy was noted in the variants with fungicide Cideli Top 140 DC (125 g/l Difenoconazole + 15 g/l ciflufenamid) and its indication was 79,6-90,0%. At a rate 0,7 l/ h, twice application of Cideli Top 140 DC fungicide during the emergence of the first buds of raspberry and before flowering resulted effectively and its biological efficacy showed 90,0%. While in the variants with fungicide Omad, 40% EC, biological efficacy was 71,9-80,5%.

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