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Effect of growth regulators on peach leaf curl intensity and yield
https://doi.org/10.31676/0235-2591-2024-3-49-55
Abstract
The Russian Black Sea coast is a favorable region for peach cultivation. Nevertheless, the humid subtropical climate promotes the active development of one of the most harmful diseases of the crop, i. e. leaf curl (Taphrina deformans (Berk.) Tul). The main method of protecting peach is chemical. However, long-term use of fungicides entails a serious ecological burden on the agrocenosis and leads to the emergence of resistance in phytopathogens. Thus, analyzing the efficiency of preparations that increase the natural immunity of plants is a relevant area. In the experiment, we studied the impact of plant growth regulators with an immune-inducing effect applied once during the flower bud stage on peach resistance to leaf curl and crop yield. The research was carried out in 2022-2023 in peach plantations using standard methods. The efficiency of preparations controlling leafcurl was assessed against an average infection background (the disease development in the control was 33.4 % in 2022 and 24.8 % in 2023). Treatment with the standard (Delan, water-soluble granules (dithianon, 700 g/kg); Scor, emulsifiable concentrate (difenoconazole, 250 g/l)) reduced the intensity of disease development by 2.9-5.7 times. A single application of the growth regulators Albit, Zerebra Agro, and Stimmunol EF during the flower bud period enabled an increase in the biological efficiency of the protective measures against peach leaf curl at the peak of the disease development (May) by 58.6-74.3 % relative to the reference variant. Moreover, the crop yield grew by 37.7-57.9 %.
Supporting agencies: The publication was prepared as part of the implementation of the state assignment Federal Research Centre the Subtropical Scientific Centre of The Russian Academy of Sciences FGRW-2022-0006, state registration no. 122042600092-8.
About the Authors
E. V. Mikhailova
Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences
Russian Federation
Russian Federation
Elena V. Mikhailova - PhD (Biol.), Head of Department
2/28, Jan Fabricius str., Sochi, 354002
N. N. Karpun
Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences
Russian Federation
Russian Federation
Dr. Sci. (Biol.), Associate Professor, Chief Researcher
Sochi
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Review
For citations:
Mikhailova E.V., Karpun N.N. Effect of growth regulators on peach leaf curl intensity and yield. Horticulture and viticulture. 2024;(3):49-55. (In Russ.) https://doi.org/10.31676/0235-2591-2024-3-49-55
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