hordeum vulgare, chenopodium album, cirsium arvense, convolvulus arvensis, lamium amplexicaule, sinapis arvensis, achillea millefolium, capsella bursa-pastoris, centaurea cyanus, euphorbia helioscopia, neslia paniculata, polygonum aviculare, rorippa sylvestris, stellaria media, thlaspi arvense, veronica polita