echinochloa crus-galli, erigeron canadensis, galinsoga parviflora, poa annua, silene latifolia, apera spica-venti, tripleurospermum inodorum, artemisia vulgaris, capsella bursa-pastoris, chenopodium album, cirsium arvense, elymus repens, lolium multiflorum, myosotis arvensis, poa trivialis, polygonum aviculare, solidago canadensis, vicia tetrasperma, viola arvensis