DOI: 10.1002/ps.1013 Economic and herbicide use impacts of glyphosate-resistant crops†

Abstract: More than 95 % of United States maize, cotton, soybean and sugarbeet acres are treated with herbicides for weed control. These products are used to improve the economic profitability of crop production for farmers. Since their introduction in 1996, over 75million acres of genetically engineered glyphosate-resistant crops have been planted, making up 80 % of soybean acres and 70 % of cotton acres in the USA. These genetically engineered crops have been adopted by farmers because they are perceived to offer greater economic benefits than conventional crop and herbicide programs. The adoption of glyphosate-resistant crops has saved US farmers $1.2 billion associated with the costs of conventional herbicide purchases, application, tillage and hand weeding. With the adoption of glyphosate-resistant sugarbeets on currently planted sugarbeet acres, US growers could potentially save an additional $93million. The adoption of glyphosate-resistant crops by US agriculture has reduced herbicide use by 37.5million lbs, although the adoption of glyphosate-resistant sugarbeets would dampen this reduction by 1million lbs