lactuca serriola, convolvulus arvensis, lolium perenne, tanacetum vulgare, urtica dioica, artemisia vulgaris, galinsoga quadriradiata, senecio viscosus, atriplex patula, bidens frondosa, elymus repens, erigeron canadensis, mercurialis annua, plantago major, sisymbrium officinale, sonchus oleraceus, stellaria media