zea mays, calystegia sepium, cirsium arvense, persicaria lapathifolia, solanum nigrum, sonchus oleraceus, alopecurus myosuroides, convolvulus arvensis, cynodon dactylon, helminthotheca echioides, lepidium coronopus, polygonum aviculare, portulaca oleracea, rapistrum rugosum, sorghum halepense, vicia sativa, cichorium intybus