text: pteridium aquilinum, amaranthus retroflexus, coleostephus myconis, glebionis segetum, solanum nigrum, amaranthus albus, centaurea aspera, chenopodium album, chondrilla juncea, cynodon dactylon, dittrichia viscosa, erigeron canadensis, rumex crispus, rumex pulcher, senecio vulgaris, setaria viridis, silene gallica, sonchus oleraceus, xanthium orientale