lepidium didymum, polygonum aviculare, lysimachia arvensis, persicaria maculosa, plantago lanceolata, poa annua, symphyotrichum squamatum, erigeron canadensis, solanum nigrum, sonchus oleraceus, veronica persica, chenopodium album, helminthotheca echioides, senecio vulgaris, sinapis arvensis, trifolium repens, verbena officinalis