arctium tomentosum, artemisia vulgaris, chenopodium album, erigeron canadensis, onopordum acanthium, achillea millefolium, atriplex patula, carduus acanthoides, cirsium vulgare, convolvulus arvensis, lolium perenne, elymus repens, galium mollugo, medicago lupulina, poa annua, polygonum aviculare, sisymbrium officinale, tripleurospermum inodorum