panicum capillare, erigeron canadensis, achillea setacea, amaranthus blitoides, amaranthus retroflexus, artemisia annua, atriplex patula, chenopodium album, cichorium intybus, cynodon dactylon, digitaria sanguinalis, eragrostis minor, lepidium ruderale, polygonum aviculare, senecio vulgaris, setaria pumila