digitaria sanguinalis, setaria pumila, setaria viridis, portulaca oleracea, convolvulus arvensis, erigeron canadensis, polygonum aviculare, capsella bursa-pastoris, cerastium holosteoides, chenopodium album, erigeron annuus, geranium pusillum, medicago lupulina, plantago lanceolata, potentilla reptans, trifolium repens, veronica arvensis