text: echinochloa colonum, digitaria sanguinalis, echinochloa crus-galli, setaria pumila, paspalum dilatatum, plantago major, amaranthus blitum, apium graveolens, calystegia sepium, erigeron bonariensis, helminthotheca echioides, medicago sativa, oxalis corniculata, paspalum vaginatum, polygonum aviculare, portulaca oleracea, setaria verticillata, sonchus asper, symphyotrichum squamatum