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Effect of growth regulators on nonspecific resistance to fruit rot and peach yield
https://doi.org/10.31676/0235-2591-2022-5-54-59
Abstract
In peach cultivation, a major problem arises in protecting the plants from a complex of diseases that have a negative effect on their performance. Тhese include fruit rots caused by the fungi Botrytis cinerea Pers. and Moninia laxa (Aderh. & Ruhland) Honey. Тhe conventional method of protection against fruit rot involves the application of chemical pesticides, whose repeated use over several years causes environmental damage to agrocenosis and induces resistance in pathogens. To reduce the pesticide load in peach orchards, the use of growth regulators that have a stimulating and immunising effect has become an important trend. Here, the effects of Zerebra Agro, BP and Biosil, BE on peach resistance to fruit rots and yield were studied, when applied both as pure agents and in a spraying mixture containing half rates of fungicides. Тhe research was carried out in peach orchards (Red Haven variety) at the Federal Research Centre “Subtropical Science Centre of RAS” (Sochi, Russia) in 2020–2021, following standard methods. Тhe effect of growth regulators was evaluated at a moderate intensity of infestation by fruit rot (intensity of grey rot and moniliosis amounted to 24.6–25.1 and 22.5–23.6 %, respectively). In the two-year experiment, the rate of grey rot and moniliosis was reduced (4.1–8.6 % for grey rot and 5.0–8.6 % for moniliosis). Тhe agent Albit, TPS in a spraying mixture containing half of the fungicides showed a biological efficiency of 72.7–78.8 %. Тhe biological efficiency of Zerebro Agro, VP amounted to 68.8–83.3 % (with fungicides in a spraying mixture) and 69.0–76.8 % (pure agent). With the application of growth regulators, peach yields varied between 57–87 centner/ha, giving an improvement of 135.7–212.2% over the control.
Keywords
About the Authors
E. V. Mikhailova
Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences
Russian Federation
Russian Federation
Mikhailova E. V., PhD (Biol.), Head of Plant Protection Department
Sochi
G. G. Pantia
Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences
Russian Federation
Russian Federation
Pantia G. G., Researcher, Plant Protection Departmen
Sochi
N. N. Karpun
Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences
Russian Federation
Russian Federation
Karpun N. N., Dr. Sci. (Biol.), Chief Researcher, Associate Professor, Plant Protection Departmen
Sochi
A. V. Rynduin
Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences
Russian Federation
Russian Federation
Rynduin A. V., Dr. Sci. (Agric.), academician of the Russian Academy of Sciences, Director
Sochi
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Review
For citations:
Mikhailova E.V., Pantia G.G., Karpun N.N., Rynduin A.V. Effect of growth regulators on nonspecific resistance to fruit rot and peach yield. Horticulture and viticulture. 2022;(5):54-59. (In Russ.) https://doi.org/10.31676/0235-2591-2022-5-54-59
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