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Table 7 Changes in selected U.S. EPA glyphosate tolerance levels (ppm)

From: Trends in glyphosate herbicide use in the United States and globally

  1993 1999 2012 2015
Soybeans
 Grain 20 20 20 40
 Hay 15 200 200 100
 Forage 15 100 100 100
Maize
 Corn grain 0.1 0.1 5 5
 Corn stover NT NT 6 100
 Sweetcorn 0.2 0.2 3.5 3.5
Oats
 Grain 0.1 0.1 0.1 30
Wheat
 Grain 0.1 5 5 30
 Straw 0.1 85 85 100
Edible beans 0.2 0.2 5 5
Alfalfa
 Dry hay 0.2 200 200 400
 Silage 0.2 75 75 400
  1. 2012 and 2015 tolerances—40 CFR Part 180.364, “Glyphosate; tolerances for residues.” 1993 tolerances—”Glyphosate Reregistration Eligibility Document (RED),” (7508 W), Office of Pesticide Programs, U.S. EPA, September 1993. 1999 tolerances—EPA Tolerance Reassessment document for Reassessed Group 3 tolerances, August 4, 1999