amaranthus retroflexus, portulaca oleracea, chaenorhinum minus, convolvulus arvensis, dysphania botrys, setaria viridis, chenopodium album, eragrostis minor, erigeron canadensis, euphorbia helioscopia, linaria angustissima, lycopsis arvensis, medicago lupulina, senecio vulgaris, solanum nigrum, papaver lecoqii, polygonum aviculare