In 2021, the occurrence of pests was observed in a foil plant for hydroponic tomato growing in the Ráječek Farm in Brno. The monitoring for Tuta absoluta (Meyrick, 1971) and visual inspection of the tomato growth took place from April to November by using yellow sticky traps and pheromone traps. The aim of the experiment was to determine the species spectrum and significance pests in the foil plant and their possible link to tomato varieties. The effect of used bioregulators was also evaluated. The application of bioagents took place once by the introduction of a polyphagous predator Macrolophus pygmaeus (Rambur, 1839). By using yellow sticky traps was found occurrence of Trialeurodes vaporariorum (Westwood, 1856) and species of the family Sciaridae. Visual inspection revealed the presence individuals of genus Liriomyza and the Aculops lycopersici (Tryon, 1917). No Tuta absoluta individuals were observed with pheromone traps. Adults of Trialeurodes vaporarium occurred predominantly in large truss varieties Tomicia and Plumola, individuals of genus Liriomyza were observed in mini varieties Belido and Maggino. The observed pests did not have a significant economic effect on the tomato growth