artemisia vulgaris, atriplex patula, atriplex sagittata, bromus erectus, bromus sterilis, carduus acanthoides, chenopodium album, daucus carota, descurainia sophia, erigeron canadensis, galinsoga parviflora, polygonum aviculare, setaria verticillata, sisymbrium loeselii, sisymbrium officinale, tripleurospermum inodorum, viola arvensis