echinochloa crus-galli, galium aparine, matricaria chamomilla, viola arvensis, amaranthus retroflexus, brassica napus, capsella bursa-pastoris, cirsium arvense, erigeron canadensis, fallopia convolvulus, matricaria discoidea, persicaria maculosa, polygonum aviculare, symphytum officinale, triticum aestivum