eng The influence of organic biostimulators on the growth and development of medicinal and aromatic plant species Ocimum basilicum L. and Levisticum officinale L. 2022 All rights reserved https://unilib.phaidrabg.rs/o:3166 cobiss:136209409 Ocimum basilicum L. and Levisticum officinale L. are well known medicinal, aromatic and spicy herbs with remarkable application in cooking and medicine. In an attempt to improve their potted production and increase the yield of aboveground biomass, a vegetation experiment was conducted in the experimental field of the Institute for Medicinal Plants Research "Dr Josif Pančić" Belgrade, Serbia. Therefore, the aim of this study was to determine the effect of organic biostimulators on germination, growth and productivity of O. basilicum and L. officinale in potted production, conducted under semi-controlled conditions. Following treatments of seeds were applied: organic biostimulators Ecobooster 1 (in concentrations 10%, 30% and 50%) and Slavol S (in concentration 10%, according to manufacturer’s recommendations), and control treatment (without biostimulators). A significantly higher number of seedlings was achieved in the treatments with biostimulators compared to control. The best effect on germination of O. basilicum and L. officinale seeds was achieved with Slavol S (91.3% and 72.5%, respectively) and Ecobooster 1 – conc. 50% (83.4% and 61.3%, respectively). The best effect on height of O. basilicum and L. officinale plants were achieved with Slavol S (26.2 cm; 14.4 cm, respectively) and Ecobooster 1 – conc. 30% (20.0 cm and 17.1 cm, respectively) and Ecobooster 1 – conc. 50% (21.7 cm; 19.4 cm, respectively), while the best effect on number of brunches showed Slavol S (2.3 and 5.1, respectively) Ecobooster 1 – conc. 10% (4.2 and 4.7, respectively) and Ecobooster 1 – conc. 30% (4.1 and 5.2, respectively). The best effect on the aboveground plant mass showed Ecobooster 1 – conc. 10% (5.03 and 1.74, g of absolute dry mass). The obtained results confirmed that both organic biostimulators positively influence the observed morphological parameters in both plant species, particularly in the earlies phases of their development. Gordanić, Stefan Radanović, Dragoja Filipović, Vladimir Mrđan, Snežana Mikić, Sara Prijić, Željana Dragumilo, Ana Marković, Tatjana application/pdf 398990 bytes BOOK OF PROCEEDINGS basil; lovage; Ecobooster 1; Slavol S. info:eu-repo/semantics/article