Chuck Benbrook's new report is available as pdfs as per below
Troubled Times Amid Commercial Success for Roundup Ready Soybeans
Glyphosate Efficacy is Slipping and Unstable Transgene Expression Erodes Plant Defenses and Yields
Dr. Charles M. Benbrook
Northwest Science and Environmental Policy Center
May 3, 2001
Why this report?
In July, 1999 we posted a report assessing the magnitude of the Roundup Ready yield drag and herbicide use on Roundup Ready soybeans in contrast to conventional varieties. This report has proven one of the most popular items on Ag BioTech InfoNet. We have received many requests for an update based on more recent data.
Title Page, TOC and Executive Summary (430KB)
Part I: Herbicides Applied to Conventional and Roundup Ready Soybeans (124KB)
Part II: New Evidence Confirms Roundup Ready Yield Drag (262KB)
Part III: Lessened Nitrogen Fixation and Weakened Immune System Response are Likely Explanations of Roundup Ready Yield Drag and Crop Losses (121KB)
Appendix 1: Herbicide Common and Chemical Names, Major Manufacturers and Average Contemporary Cost per Pound of Active Ingredient (65KB)
References and Further Information (109KB)
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