symphyotrichum ciliatum, ambrosia artemisiifolia, artemisia annua, atriplex prostrata, carduus acanthoides, cichorium intybus, daucus carota, echinochloa crus-galli, elymus repens, erigeron canadensis, lactuca serriola, lepidium ruderale, lolium perenne, medicago lupulina, oxybasis urbica, persicaria maculosa, plantago major, poa annua, polygonum aviculare, setaria pumila, sonchus arvensis, trifolium fragiferum, trifolium repens, tripleurospermum inodorum, xanthium strumarium