ambrosia artemisiifolia, erigeron canadensis, artemisia absinthium, carduus acanthoides, cirsium arvense, convolvulus arvensis, elymus repens, erigeron acris, medicago falcata, medicago sativa, melilotus officinalis, tragopogon dubius, delphinium consolida, matricaria chamomilla, stachys recta, verbascum lychnitis