zea mays, helminthotheca echioides, calystegia sepium, capsella bursa-pastoris, cirsium arvense, daucus carota, lepidium coronopus, lepidium ruderale, medicago lupulina, persicaria lapathifolia, polygonum aviculare, rapistrum rugosum, setaria viridis, solanum nigrum, sonchus arvensis, sonchus oleraceus, trifolium repens