Apple scab development: an agro-climatic and phytopathological study in a Moscow Region orchard

The article discusses a comprehensive agro-climatic and phytopathological analysis of factors that determine the dynamics of apple scab development in an orchard located in Solnechnogorsk, Moscow region during 2023–2024. The study analyzes weather patterns, varietal susceptibility and the impact of local microclimate based on data from meteorological stations No.27417 (Klin) and KaipoMini 2.1 automated stations within the orchard. Significant variations in temperature and humidity were identified at regional and local levels, necessitating localized monitoring systems. The validation of the prognostic model of scab ascospore maturation and the model of conidial stage development on the Agrokeep intelligent platform was carried out. A strong correspondence has been established between the calculated episodes and the actual outbreaks of the disease on apple varieties Mantet, Melba and Lobo, which differ in sensitivity. In addition, the prevalence of other diseases, such as scab, powdery mildew, phyllostictosis and moniliosis was monitored. The analysis revealed that some varieties, such as Mantet, Lobo and Melba, were more susceptible to pathogens, while other varieties, like Imrus and Orlovim, were less susceptible. This data supports the need to incorporate local meteorological information into plant protection plans and phytosanitary forecasts. These findings provide a scientific basis for the development of adaptive systems for fruit crop protection in a changing climate.

1. Merezhko O.E., Aminova E.V. Analysis of the assortment and dynamics of cultivation of apple tree (Malus domestica Borkh.) in horticulture in Russia. Vestnik of Voronezh State Agrarian University. 2023;16(3(78)):94-100. (In Russ.) https://doi.org/10.53914/issn2071-2243_2023_3_94

2. Trunov Yu.V., Soloviev A.V., Kulichikhin I.V. Productivity models of modern apple gardens in central Russia. The Bulletin of Michurinsk State Agrarian University. 2022;(2(69)):12-17. (In Russ.)

3. Trunov Y.V. Problems of Russian horticulture as a manageable evolving system. Pomiculture and Small Fruits Culture in Russia. 2015;42:297-299. (In Russ.)

4. Upadyshev M.T., Makarov S.S., Upadysheva G.Yu. Apple tree resistance to high temperature stress. Izvestiya of Timiryazev Agricultural Academy. 2024;(1):89-99. (In Russ.) https://doi.org/10.26897/0021-342X-2024-1-89-99

5. Upadyshev M.T., Makarov S.S., Upadysheva G.Yu. Peculiarities of organogenesis and recovery of apple tree clonal rootstock from viruses using complex in vitro therapy. Izvestiya of Timiryazev Agricultural Academy. 2025;(1):93-107. (In Russ.) https://doi.org/10.26897/0021-342X-2025-1-93-107

6. Sedov E.N., Korneeva S.A., Yanchuk T.V. The role of domestic breeding in improving the apple assortment in Russia. Vestnik of the Russian Agricultural Science. 2021;(4):17-19. (In Russ.) https://doi.org/10.30850/vrsn/2021/4/17-19

7. Antonenko V.V., Zubkov A.V., Kruchina S.N. Peculiarities of the development of apple trees and pear fungous diseases under the conditions of Non-Black Earth zone. Bulletin of Agrarian Science. 2020;(2(83)):9-14. (In Russ.) https://doi.org/10.17238/issn2587-666X.2020.2.9

8. Kashirskaya N.I., Kochkina A.M. Modern apple orchard protection systems against scab. Achievements of Science and Technology of Agro-Industrial Complex. 2019;33(2):50-51. (In Russ.) https://doi.org/10.24411/0235-2451-2019-10212

9. Kumakhova T.Kh., Beloshapkina O.O., Voronkov A.S., Ryabchenko A.S. Morphofunctional characteristics of leaves and fruits in Maloideae (Rosaceae): b) The role of surface tissues in the formation of resistance to fungal diseases. Proceedings on Applied Botany, Genetics and Breeding. 2019;180(2):95-101. (In Russ.) https://doi.org/10.30901/2227-8834-2019-2-95-101

10. Kumakhova T.Kh., Beloshapkina O.O., Voronkov A.S. The Maloideae (Rosaceae) Structural and Functional Features Determining Passive Immunity to Mycosis. Asian Journal of Research in Botany. 2019;2(1):39-51. https://journalajrib.com/index.php/AJRIB/article/view/15

11. Holb I.J. Fungicide Resistance and Management of Apple Scab (Venturia inaequalis) in Europe: A Review. Crop Protection. 2017;97:52-59.

12. Holb I.J., Heijne B., Withagen J.C.M. Analysis of Apple Scab (Venturia inaequalis) Epidemics and the Development of a Forecasting model for integrated disease management. European Journal of Plant Pathology. 2015;143(3):511-524.

13. Trapman M. RIMpro: A Decision Support System for Integrated Pest Management in Fruit Production. IOBC-WPRS Bulletin. 2015;112:13-20.

14. Blažek J., Vaněk D. Diseases of Apple Trees and Their Control. Horticultural Science (Prague). 2016;43(1):1-7.

15. Methodical guidelines for registration tests of fungicides in agriculture. Ed. by V.I. Dolzhenko. St. Petersburg, Russia: All-Russian Institute of Plant Protection, 2009:379. (In Russ.)

16. Selyaninov G.T. On the agricultural evaluation of climate. Trudy po selskokhozyaistvennoy meteorologii. 1928;(20):165-177. (In Russ.)

17. Perevedentsev Yu.P., Sharipova R.B., Vazhova N.A. Agroclimatic resources of the Ulyanovsk region and their impact on the yield of crops. Vestnik Udmurtskogo Universiteta. Seriya Biologiya. Nauki o Zemle. 2012;(2):120-126. (In Russ.)

18. Kuznetsov G.V. Excel: conditional formatting using formulas. Vestnik Ufimskogo gosudarstvennogo neftyanogo tekhnicheskogo universiteta. 2025;(3):12-18. (In Russ.)

19. Eliseev I.P., Eliseeva L.V., Dimitriev V.L. Weather station data and productivity of field crops under conditions of insufficient moisture. VII Mezhdunarodnaya nauchno-prakticheskaya konferentsiya ‘Nauchno-obrazovatelnye i prikladnye aspekty proizvodstva i pererabotki selskokhozyaystvennoy produktsii’. November 15, 2023. Cheboksary, Russia: Chuvash State Agrarian University, 2023;55-61. (In Russ.)

20. Makushin A.N., Vasiliev S.A., Brumin A.Z. Application of Kaipos intelligent monitoring systems for predicting the development of plant diseases and pests. Mezhdunarodnaya nauchno-prakticheskaya konferentsiya ‘Innovatsionnye dostizheniya nauki i tekhniki APK’. December 11-12, 2019. Samara, Russia: Samara State Agrarian University, 2019:503-506. (In Russ.)