hordeum murinum, ballota nigra, polygonum aviculare, amaranthus retroflexus, chenopodium album, apera spica-venti, artemisia vulgaris, atriplex oblongifolia, atriplex tatarica, erigeron canadensis, lolium perenne, solanum nigrum, lepidium draba, matricaria discoidea, oxybasis glauca, poa annua, tripleurospermum inodorum