setaria pumila, spergula arvensis, scleranthus annuus, anthemis arvensis, arnoseris minima, chenopodium album, cirsium arvense, convolvulus arvensis, digitaria ischaemum, echinochloa crus-galli, erodium cicutarium, galeopsis tetrahit, geranium pusillum, gnaphalium uliginosum, juncus bufonius, plantago lanceolata, solidago canadensis, stachys palustris, veronica arvensis