veronica arvensis, capsella bursa-pastoris, trifolium repens, poa annua, amaranthus retroflexus, brassica rapa, chenopodium album, echinochloa crus-galli, elymus repens, erigeron annuus, erigeron canadensis, euphorbia helioscopia, galinsoga parviflora, geranium pusillum, portulaca oleracea