Biological testing of synthetic compounds − (thio)semicarbazones 2,4-diarylbicyclo[3.3.1]non-2-en-9-ones, differing in the nature of aryl substituents and N-nucleophile, was carried out. The compounds under study were obtained at the Department of Organic and Bioorganic Chemistry of the Institute of Chemistry of the Saratov National Research State University.The object of the study was seedlings of spring soft wheat Triticum aestivum L. of the Saratovskaya 36 variety. Before cultivation, seed treatment with test solutions was performed.