EN
The development as well as harmfulness of two-spotted spider mite (Tetranychus urticae Koch.) on cucumber plants treated with two biostimulators: Asahi SL and Siapton 10 L was studied in glasshouse and laboratory conditions. It was found, that both used biostimulators limited the development of spider mites, specially Siapton 10 L. Simultaneously the shoots of damaged plants had grown faster as compared to the plants on which biostimulators were not used. Siapton evidently stimulated flowering of mite damaged plants.