echinochloa crus-galli, galinsoga parviflora, amaranthus powellii, cynodon dactylon, amaranthus blitum, amaranthus retroflexus, calystegia sepium, capsella bursa-pastoris, cirsium arvense, convolvulus arvensis, euphorbia helioscopia, medicago lupulina, persicaria maculosa, polygonum aviculare, rorippa sylvestris, setaria pumila, sonchus asper, sonchus oleraceus, trifolium repens