lactuca serriola, sisymbrium altissimum, tripleurospermum inodorum, artemisia vulgaris, atriplex patula, atriplex sagittata, capsella bursa-pastoris, carduus acanthoides, carduus crispus, chenopodium album, erigeron canadensis, linaria vulgaris, lipandra polysperma, poa annua, poa palustris, senecio viscosus, viola arvensis