euphorbia maculata, eragrostis minor, amaranthus albus, lepidium ruderale, polygonum aviculare, artemisia annua, carduus acanthoides, chenopodium album, convolvulus arvensis, erigeron canadensis, galinsoga parviflora, lepidium virginicum, medicago lupulina, plantago arenaria, plantago lanceolata, poa annua, setaria pumila, tripleurospermum inodorum, xanthium strumarium