erigeron canadensis, convolvulus arvensis, amaranthus retroflexus, arctium lappa, arenaria serpyllifolia, bromus grossus, chenopodium album, erodium cicutarium, lactuca serriola, lepidium draba, setaria viridis, torilis arvensis, artemisia vulgaris, hordeum murinum, tragopogon dubius, tripleurospermum inodorum