The effect of the drug Zircon on the decorative qualities of large-flowered eustoma plants in potNatal’ya Varfolomeyeva, Elena Blagorodova, Tamara Nepshekueva, Anastasiya Zvyagina and Dmitriy AndreychukE3S Web Conf., 398 (2023) 01033DOI: https://doi.org/10.1051/e3sconf/202339801033