zea mays, solanum nigrum, amaranthus retroflexus, calystegia sepium, capsella bursa-pastoris, chenopodium album, echinochloa crus-galli, helminthotheca echioides, lepidium ruderale, persicaria lapathifolia, polygonum aviculare, senecio vulgaris, sonchus oleraceus, stellaria media, verbena officinalis, picris hieracioides, symphyotrichum squamatum