This abstract presents the results of screening for allelopathic activity of three pairs “aboriginal-exotic” of comparison species of herbs, including invasive species, systematically related at the level of the genus. It was shown that a 1% leaf extract of Solidago virgaurea and S. canadensis, Pulmonaria obscura and P. saccharata, Veronica serpyllifolia and V. fi liformis had a similar or equal inhibitory eff ect on the germination and growth of test-plant roots in biotests owing to its chemosystematic correlation.
