"Name of Contaminant";"Common name";"# Reports (%)";"# Crops" "Chenopodium album L.";Lamb’s-quarters;"356 (38%)";10 "Fallopia convolvulus (L.) Á. Löve";"Wild buckwheat";"306 (32 %)";9 "Amaranthus retroflexus L.";"Redroot pigweed";"287 (30%)";9 "Setaria italica (L.) P. Beauv. subsp. viridis (L.) Thell.";"Green foxtail";"262 (28 %)";9 "Avena fatua L.";"Wild oat";"241 (25 %)";9 "Triticum aestivum L.";Wheat;"229 (24 %)";9 "Bassia scoparia (L.) A. J. Scott";Kochia;"222 (23 %)";9 "Thlaspi arvense L.";Stinkweed;"198 (21 %)";8 "Brassica napus L. subsp. napus";"Canola or rapeseed";"190 (20%)";8 "Echinochloa crus-galli (L.) P. Beauv.";"Barnyard grass";"177 (19%)";10 "Sinapis arvensis L.";"Wild mustard";"143 (15 %)";8 "Setaria pumila (Poir.) Roem. & Schult. subsp. pumila";"Yellow foxtail";"127 (13 %)";9 "Bromus tectorum L.";"Downy brome";"122 (13 %)";4 "Hordeum vulgare L. subsp. vulgare";Barley;"111 (12 %)";7 "Descurainia sophia (L.) Webb ex Prantl";Flixweed;"103 (11 %)";6 "Helianthus annuus L.";Sunflower;"103 (11 %)";8 "Persicaria lapathifolia (L.) Delarbre";"Pale smartweed";"90 (10%)";10 "Salsola tragus L.";"Russian thistle";"83 (9 %)";8 "Cirsium arvense (L.) Scop.";"Canada thistle";"82 (9 %)";5 "Avena sativa L.";Oats;"79 (8 %)";8