Climate drivers of Drosophila suzukii (Matsumura) spread and phytosanitary risk forecast for berry production in Lviv region
Abstract
Purpose. To assess the impact of climate change on the dynamics of spread of the invasive pest Drosophila suzukii (Matsumura, 1931) in Lviv region and to forecast phytosanitary risk for berry production up to 2030-2035.
Methods. Analysis of meteorological trends using data from Lviv meteorological station (2001–2023); calculation of degree-day sums (SAT/SET); IPCC RCP4.5 and RCP8.5 scenario-based projection; linear extrapolation of generation number; calculation of potential economic losses for major berry crops.
Results. Over 2001–2023, the sum of active temperatures increased by 270 degree-days (p < 0.05), and the number of days with temperatures below –7 °C decreased twofold. Under the RCP4.5 scenario, conditions for 4–5 generations of D. suzukii per year will form by 2030–2035. Under RCP8.5, up to 5–6 generations are projected. Potential economic losses for berry production in Lviv Oblast are estimated at 284–339 million UAH/year (RCP4.5) and 310–380 million UAH/year (RCP8.5).
Conclusions. Results justify the establishment of a regional phytosanitary monitoring system with attractive trap networks, mandatory inclusion of D. suzukii in Ukraine's quarantine organism list, mandatory planting material certification, and harmonization of Ukrainian phytosanitary standards with EU Regulation 2016/2031.
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References
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Copyright (c) 2026 Kovalchuk, O. I., Kovalchuk, Yu. O., & Stiurko, M. O.

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