Environmental Management

, Volume 57, Issue 1, pp 31–48

Genetically Modified Herbicide-Tolerant Crops, Weeds, and Herbicides: Overview and Impact

Article

DOI: 10.1007/s00267-015-0589-7

Cite this article as:
Bonny, S. Environmental Management (2016) 57: 31. doi:10.1007/s00267-015-0589-7

Abstract

Genetically modified (GM) crops have been and continue to be a subject of controversy despite their rapid adoption by farmers where approved. For the last two decades, an important matter of debate has been their impact on pesticide use, particularly for herbicide-tolerant (HT) crops. Some claim that these crops bring about a decrease in herbicide use, while others claim the opposite. In fact, since 1996, most cultivated GMOs have been GMHT crops, which involve the use of an associated herbicide, generally glyphosate. In their very first years of adoption, HT crops often led to some decrease in herbicide use. However, the repetition of glyphosate-tolerant crops and of glyphosate only applications in the same fields without sufficient alternation and herbicide diversity has contributed to the appearance of glyphosate-resistant weeds. These weeds have resulted in a rise in the use of glyphosate and other herbicides. This article explores this situation and the impacts of herbicide-resistant weeds, using an interdisciplinary approach and drawing on recent data. The paper analyzes the spread of GMHT crops worldwide and their consequences on herbicide use in the USA in particular. It then addresses the global development of glyphosate-resistant weeds and their impact, particularly focusing on the USA. Finally, the last section explores how industry, farmers, and weed scientists are coping with the spread of resistant weeds. The concluding comments deal more widely with trends in GM crops.

Keywords

Agriculture Transgenic crop GMO impact Herbicide Weed resistance Economics 

Abbreviations

APHIS

USDA Animal and Plant Health Inspection Service

BMPs

Best management practices

GM

Genetically modified

GMHT

Genetically modified herbicide-tolerant

GMGT

Genetically modified glyphosate-tolerant

GR

Glyphosate-resistant (for weeds)

GT

Glyphosate-tolerant (for crops)

HR

Herbicide-resistant (for weeds)

HT

Herbicide-tolerant (for crops)

USDA

United States Department of Agriculture

USDA-ERS

USDA Economic Research Service

USDA-NASS

USDA National Agricultural Statistics Service

USEPA

US Environmental Protection Agency

USGS

US Geological Survey

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.INRA, UMR210 Economie publiqueGrignonFrance
  2. 2.AgroParisTech, UMR Economie publiqueGrignonFrance

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