brassica napus, viola arvensis, centaurea cyanus, tripleurospermum inodorum, apera spica-venti, chenopodium album, elymus repens, galium aparine, lysimachia arvensis, myosotis arvensis, polygonum aviculare, scleranthus annuus, sisymbrium officinale, thlaspi arvense, vicia hirsuta, vicia tetrasperma