euphorbia maculata, eragrostis minor, lepidium virginicum, polygonum aviculare, amaranthus albus, amaranthus blitoides, artemisia annua, atriplex tatarica, carduus acanthoides, chenopodium album, convolvulus arvensis, digitaria sanguinalis, erigeron canadensis, erodium cicutarium, galinsoga parviflora, hordeum murinum, lappula squarrosa, lepidium ruderale, lolium perenne, medicago lupulina, plantago major, poa annua, setaria pumila, tripleurospermum inodorum, xanthium spinosum, xanthium strumarium