chenopodium album, dysphania ambrosioides, symphyotrichum squamatum, daucus carota, digitaria sanguinalis, dittrichia graveolens, dittrichia viscosa, erigeron bonariensis, erigeron canadensis, erigeron sumatrensis, lolium perenne, picris hieracioides, plantago lanceolata, portulaca oleracea