UDC 631.527:633.491
DOI 10.36461/NP.2026.77.1.007

IMPACT OF POTATO CULTIVATION CONDITIONS ON LATE BLIGHT
¹T.V. Tskaeva, Postgraduate, ¹S.S. Basiev, Doctor of Agricultural Sciences, Professor,
¹E.A. Tsagaraeva, Doctor of Biological Sciences, Professor,
¹A.A. Abaev, Doctor of Agricultural Sciences, Professor,
²Ts.G. Dzhioeva, Doctor of Agricultural Sciences, Professor
¹Gorsky State Agrarian University, Vladikavkaz, Russia, +7 (919) 426-06-13, This email address is being protected from spambots. You need JavaScript enabled to view it.
²South Ossetian State University named after A.A. Tibilov, Tskhinval, Republic of South Ossetia, This email address is being protected from spambots. You need JavaScript enabled to view it.

This article deals with the impact of potato agrotechnical cultivation conditions on the development of late blight (Phytophthora infestans). Current research is devoted to the correlation between plant spacing, physiological status, and resistance level to this pathogen. The research also analyzes the differential response of cultivars from various maturity groups to cultivation conditions within the specific agro-landscape of mountain-meadow soils in the Republic of North Ossetia-Alania. Despite identified varietal differences in susceptibility, common patterns were also noted. In particular, for all examined cultivars, regardless of their earliness, the necessity of fungicide applications within the plant protection system has been observed. This measure becomes critically important for new high-yielding and intensive cultivars, whose genetic yield potential could be completely negated by a late blight epiphytotic. The research results definitely indicate that even optimal agrotechnical measures (expanded plant spacing, balanced mineral nutrition) cannot ensure complete protection against the pathogen. Integration with specialized protective measures is required. One such key measure, especially for cultivars with vulnerable tubers (such as Ryabinushka, Adeon, and others), is the careful breeding of promising seeds for planting. This approach helps reduce the primary infection and delay disease development. The obtained results are practical and aimed at improving potato cultivation technology with minimization of losses from late blight through support of natural plant resistance and rational application of protective measures.
Keywords: late blight, fertilizer, tuber, nutrition, cultivar, breeding, vegetation, variant

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