The responsiveness of plum varieties to climate change has not been sufficiently studied. Plum is a hardy and highly productive crop. However, not all plum varieties have ecological plasticity. The object of research was the zoned and introduced plum varieties: Sharovaya, Antonina, Nadezhda Primorya, Primorochka, Romen, Shchedraya, Varvara-krasa, Egorovna, Asaloda, Kubanskaya kometa. The article presents the results of studying the influence of weather conditions during flowering, fruit formation and ripening on plum yield in the conditions of the south of Primorye. Low average daily air temperature and a large amount of precipitation during flowering have a negative impact on plum yields. It has been established that the lack or excess of moisture during the formation and growth of fruits reduces the yield of plums. Fruit rot damage depends on the varietal characteristics of the plum and the weather conditions of the year. The yield depended on the biological characteristics of the variety and the weather conditions of the year (4.8–19.3 kg/tree). It is established that the date of the beginning of plum blossom is closely related to the weather conditions of the year. The most adaptive and productive plum varieties were identified: Primorochka (13.8 kg/tree), Romen (12.5 kg/tree) of the selection of the Primorsky Fruit and Berry Experimental Station, Kubanskaya kometa (13.6 kg/tree) of the Crimean Experimental Breeding Station, Asaloda (9.6 kg/tree) of the Belarusian Research Institute of Fruit Growing. The promising plum varieties Shchedraya and Romen are the source material for breeding.

Yakovleva Valentina V.

1. Prichko T. G. Biotechnological methods used in the cultivation and storage of fruits. BIO Web of Conferences, 2022;46:01005. DOI:10.1051/bioconf/20224601005.
2. Prichko T. G., Droficheva N. V. Assessment of biochemical and technical indicators of the quality of plum fruits grown in the south of Russia. BIO Web of Conferences, 2021;36:02001. DOI: https://doi.org/10.1051/bioconf/20213602001.
3. Zaremuk R. Sh. Domestic plum varieties to optimize the southern assortment. Subtropicheskoe i dekorativnoe sadovodstvo, 2018;66:34–40 (in Russ.) DOI: 10.31360/2225-3068-2018-66-34-40.
4. Kaufmane E., Gravite I., Ikase L. Plum research and growing in Latvia. Proceedings of the Latvian Academy of Sciences, 2019;73;3:195–206. DOI: 10.2478/prolas-2019-0032.
5. Bilal W., Bhutta M. S., Rehman Kh. Ur., Ahmad N. Physical and chemical attributes of various cultivars of Plum fruit. Pure and Applied Biology, 2021;4;3:353–361. DOI: 10.19045/bspab.2015.43011.
6. Simonov V. S. Promising varieties of homemade plum for the Moscow region. Sadovodstvo i vinogradarstvo, 2018;4(214):26–31 (in Russ.). DOI: 10.31676/0235-2591-2018-4-26-31.
7. Popova L. V., Ivanenko E. N., Sukhovetchenko O. S. Plum varieties for intensive gardening in arid conditions. Vestnik Kurskoi gosudarstvennoi sel'skokhozyaistvennoi akademii, 2018;6:44–48 (in Russ.).
8. Yakovleva V. V. Sources of resistance to fungal diseases for the creation of new plum varieties in the conditions of the south of Primorye. Dal'nevostochnyj agrarnyj vestnik, 2021;4(60):65–71 (in Russ.) DOI: 10.24412/1999-6837-2021-4-65-71.
9. Program and methodology of variety study of fruit, berry and nut crops, Orel, Vserossijskij nauchno-issledovatel'skij institut selekcii plodovyh kul'tur, 1999, 606 p. (in Russ.).
10. Program and methodology of selection of fruit, berry and nut crops, Orel, Vserossijskij nauchno-issledovatel'skij institut selekcii plodovyh kul'tur, 1995, 501 p. (in Russ.).