lepidium virginicum, amaranthus retroflexus, apera spica-venti, elymus repens, poa annua, setaria viridis, sisymbrium altissimum, artemisia vulgaris, bromus hordeaceus, bromus tectorum, capsella bursa-pastoris, chaenorhinum minus, chenopodium album, erigeron canadensis, fallopia convolvulus, lactuca serriola, senecio vernalis, senecio vulgaris, achillea collina, erysimum cheiranthoides, galinsoga parviflora, medicago lupulina, polygonum aviculare, sonchus oleraceus, stellaria media