draba verna, arabidopsis thaliana, capsella bursa-pastoris, chenopodium album, descurainia sophia, echinochloa crus-galli, myosotis stricta, poa annua, stellaria media, tripleurospermum inodorum, erigeron annuus, myosurus minimus, sagina procumbens, trifolium repens, urtica urens, veronica peregrina