matricaria discoidea, capsella bursa-pastoris, convolvulus arvensis, lolium perenne, matricaria chamomilla, amaranthus retroflexus, artemisia vulgaris, atriplex patula, bromus hordeaceus, chenopodiastrum hybridum, chenopodium album, erigeron canadensis, euphorbia helioscopia, galinsoga parviflora, galinsoga quadriradiata, galium aparine, geranium pusillum, lactuca serriola, plantago major, poa annua, poa trivialis, polygonum aviculare, sonchus oleraceus, stellaria media, urtica dioica, bromus carinatus, descurainia sophia, elymus repens