chenopodium album, zea mays, capsella bursa-pastoris, elymus repens, equisetum arvense, erigeron canadensis, galeopsis tetrahit, galium aparine, lolium perenne, matricaria discoidea, persicaria maculosa, plantago major, poa annua, setaria pumila, sisymbrium officinale, stellaria media, tripleurospermum inodorum, achillea millefolium