hordeum murinum, ballota nigra, descurainia sophia, lolium perenne, sisymbrium officinale, achillea millefolium, atriplex patula, convolvulus arvensis, daucus carota, erigeron canadensis, geranium pusillum, lepidium ruderale, plantago lanceolata, plantago major, poa annua, polygonum aviculare, sonchus oleraceus