ANTIMICROBIAL ACTIVITY OF <i>MONARDA FISTULOSA </i>DURING THE GROWING PERIOD
Antimicrobial activity of extracts from the above-ground part of Monarda fi stulosa L. with respect to fi ve strains of gram-positive pathogenic bacteria was analyzed. High antimicrobial activity of the water-ethanol extracts against Bacillus cereus ATCC 10702 and B. subtilis ATCC 6633 throughout the growing period was established. Antimicrobial activity against Staphylococcus haemolyticus 1700 MRS, Enterococcus faecium ATCC 19434 and B. cereus ATCC 14579 varied during the growing period from a complete absence to a high degree of activity. Th e antimicrobial activity of the M. fi stulosa extracts was influenced from the development phase, method of preparing the extracts and their concentration, as well as by the specificity of the strains.