medicago sativa, amaranthus retroflexus, amaranthus powellii, echinochloa crus-galli, cirsium arvense, fallopia convolvulus, solanum nigrum, amaranthus blitoides, capsella bursa-pastoris, chenopodiastrum hybridum, erigeron canadensis, sonchus oleraceus, stachys annua, stellaria media, tripleurospermum inodorum