Effect of copper hydroxide concentrations on yield formation of indeterminate tomato hybrids under protected cultivation
DOI:
https://doi.org/10.31210/spi2026.29.01.06Keywords:
tomato (Solanum lycopersicum L.), hybrids, cultivation technology, copper hydroxide, fungicidal protection, productivityAbstract
Stabilization of vegetable crop productivity in protected cultivation systems under conditions of intensified phytopathogenic pressure of fungal and bacterial etiology requires optimization of fungicide load, taking into account economic feasibility and the regulated effectiveness of product application. With increasing phytopathological risks in greenhouse tomato cultivation, this necessitates a comparative evaluation of fungicide efficiency at different concentrations in order to determine the most effective application regimes. The article investigates the effect of the fungicide Champion, based on copper hydroxide, on the yield of indeterminate tomato hybrids when applied at concentrations of 3, 6, and 9 g/L in a plastic-film greenhouse of the Left-Bank Forest-Steppe zone of Ukraine. The aim of the research was to determine the optimal concentration of the copper hydroxide preparation capable of ensuring increased yield and maintaining stable plant productivity under cultivation conditions. The experiments were conducted in four replications with a standardized treatment regime during early vegetative and generative growth stages. The control variant involved cultivation without product treatment, against which the average yield reached 17.4 kg/m2 for the hybrid Matias F1 and 16.4 kg/m2 for the hybrid Panekra F1. On average for 2018–2021, a product concentration of 3 g/L provided yields at the level of 16.2–16.8 kg/m2, whereas the concentration of 6 g/L resulted in the highest performance – 17.2–17.4 kg/m2, with an increase of up to 5.0 % compared to the control, indicating the optimality of this regime. At the concentration of 9 g/L, yield amounted to 17.0–17.3 kg/m2, with an increase of up to 3.6 %. Multi-year analysis demonstrated the repeatability and stability of the effect specifically at the concentration of 6 g/L, while the doses of 3 and 9 g/L were characterized by lower efficiency. The practical significance lies in the agrotechnological substantiation of copper-containing product application, which ensures stable yield formation of indeterminate tomato hybrids and reduces the risk of production losses in commercial greenhouse production.
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