text: amaranthus retroflexus, eragrostis barrelieri, chenopodium album, erigeron sumatrensis, calendula arvensis, cynodon dactylon, digitaria sanguinalis, dittrichia viscosa, dysphania pumilio, heliotropium europaeum, malva sylvestris, portulaca oleracea, rumex bucephalophorus, setaria viridis, sonchus oleraceus, tribulus terrestris