echinochloa crus-galli, ambrosia artemisiifolia, bidens frondosa, erigeron canadensis, rorippa palustris, solidago gigantea, artemisia annua, artemisia vulgaris, chenopodium album, erigeron annuus, galinsoga quadriradiata, gnaphalium uliginosum, helianthus annuus, lepidium virginicum, matricaria chamomilla, persicaria hydropiper, raphanus raphanistrum, sicyos angulatus, veronica anagallis-aquatica, xanthium orientale