amaranthus deflexus, lepidium didymum, erigeron bonariensis, lepidium coronopus, poa annua, polygonum aviculare, senecio vulgaris, symphyotrichum squamatum, bellis perennis, cirsium arvense, erigeron canadensis, helminthotheca echioides, medicago lupulina, piptatherum miliaceum, plantago major, solanum nigrum, verbena officinalis