persicaria maculosa, poa annua, polygonum aviculare, dysphania ambrosioides, galinsoga quadriradiata, symphyotrichum squamatum, bromus catharticus, chenopodium album, helminthotheca echioides, lolium perenne, mercurialis annua, piptatherum miliaceum, plantago major, rumex obtusifolius, senecio vulgaris, sonchus oleraceus