chenopodium album, dysphania botrys, erigeron canadensis, verbena officinalis, amaranthus albus, capsella bursa-pastoris, carduus acanthoides, chenopodium ficifolium, convolvulus arvensis, erysimum cheiranthoides, medicago lupulina, onopordum acanthium, papaver rhoeas, polygonum aviculare, senecio vulgaris, sisymbrium officinale, sonchus asper