zea mays, amaranthus retroflexus, echinochloa crus-galli, solanum nigrum, calystegia sepium, chenopodium album, convolvulus arvensis, geranium molle, helminthotheca echioides, lysimachia arvensis, marrubium vulgare, matricaria chamomilla, persicaria maculosa, portulaca oleracea, potentilla reptans, setaria verticillata, setaria viridis, sonchus oleraceus, sorghum halepense, erigeron canadensis, picris hieracioides, symphyotrichum squamatum