amaranthus deflexus, lolium perenne, cirsium arvense, erigeron canadensis, hordeum murinum, arctium lappa, artemisia tournefortiana, bromus sterilis, calamagrostis epigejos, elymus repens, mercurialis annua, picris hieracioides, plantago major, poa annua, poa pratensis, setaria verticillata, setaria viridis, sisymbrium loeselii