hordeum murinum, polypogon viridis, bromus rigidus, crepis capillaris, erigeron floribundus, sisymbrium officinale, avena barbata, brassica nigra, bromus rubens, bromus sterilis, catapodium rigidum, euphorbia peplus, helminthotheca echioides, holcus lanatus, oxalis corniculata, plantago major, poa annua, polygonum aviculare, rumex crispus, rumex pulcher, trifolium repens, verbena officinalis