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Benchmark Study: II. A 2010 Survey to Assess Grower Awareness of and Attitudes toward Glyphosate Resistance

  • Joby M. Prince (a1), David R. Shaw (a1), Wade A. Givens (a1), Michael E. Newman (a1), Micheal D. K. Owen (a2), Stephen C. Weller (a3), Bryan G. Young (a4), Robert G. Wilson (a5) and David L. Jordan (a6)...

A 2010 survey of 1,299 corn, cotton, and soybean growers was conducted to determine their attitudes and awareness regarding glyphosate-resistant (GR) weeds and resultant implications on weed management practices. An additional 350 growers included in the current study participated in a 2005 survey, and these answers were compared across time so that cross-sectional and longitudinal comparisons of responses could be made. Most growers surveyed in 2010 were aware of the potential for weeds to evolve resistance to glyphosate; however, many growers were not aware of glyphosate resistance in specific weeds in their county or state. Growers in the South were different from growers in other geographic regions and were significantly more aware of local cases of GR weeds. Awareness of GR weeds did not increase appreciably from 2005 to 2010, but the percentage who reported GR weeds as problematic was significantly higher. Grower reports of GR weeds on-farm in 2010 were up considerably from 2005, with growers in the South reporting significantly more instances than growers in other regions. Growers in the South were also more likely to consider glyphosate resistance a serious problem. Overall, 30% of growers did not consider GR weeds to be a problem. It appears that most growers received information about glyphosate resistance from farm publications, although in the South this percentage was less than for other geographic regions. Growers in the South received more information from universities and extension sources.

En 2010 se realizó una encuesta a 1299 productores de maíz, algodón y soya para determinar sus actitudes y conocimientos en relación a las malezas resistentes a glyphosate (GR), y las consecuentes implicaciones en las prácticas de manejo de malezas. Un grupo adicional de 350 productores incluidos en el estudio actual participaron en una encuesta en 2005, y sus respuestas fueron comparadas a través del tiempo de tal manera que se pudieran hacer comparaciones transversales y longitudinales de las mismas. La mayoría de los productores encuestados en 2010 estaban conscientes del potencial de las malezas para desarrollar resistencia a glyphosate; sin embargo, muchos de ellos no sabían de malezas específicas resistentes a glyphosate en su condado o estado. Las respuestas de los productores del sur fueron diferentes a las de los productores de otras regiones geográficas ya que los primeros estaban significativamente más al tanto de casos locales de malezas GR. El conocimiento sobre malezas GR no se incrementó apreciablemente de 2005 a 2010, pero el porcentaje de quienes reportaron malezas GR como problemáticas fue significativamente mayor. En 2010 los reportes de productores con problemas de malezas GR en su finca fueron considerablemente más frecuentes que en 2005, con productores en el sur reportando significativamente mayor incidencia que los de otras regiones. Además, los productores en el sur consideraron con mayor frecuencia la resistencia a glyphosate como un problema serio. En general, 30% de los productores no consideraron que las malezas GR sean un problema. Parece que la mayoría de los productores recibió información sobre la resistencia a glyphosate en publicaciones agrícolas, aunque en el sur este porcentaje fue menor que en las otras regiones geográficas. Los productores del sur recibieron más información de universidades y de fuentes de extensión agrícola.

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C. Foresman and L. Glasgow 2008. US grower perceptions and experiences with glyphosate-resistant weeds. Pest Manag. Sci. 64:388391.

W. A. Givens , D. R. Shaw , W. G. Johnson , S. C. Weller , B. G. Young , R. G. Wilson , M. D. K. Owen , and D. Jordan 2009a. A grower survey of herbicide use patterns in glyphosate-resistant cropping systems. Weed Technol. 23:156161.

W. A. Givens , D. R. Shaw , G. R. Kruger , W. G. Johnson , S. C. Weller , B. G. Young , R. G. Wilson , M. D. K. Owen , and D. Jordan 2009b. Survey of tillage trends following the adoption of glyphosate-resistant crops. Weed Technol. 23:150155.

W. A. Givens , D. R. Shaw , and M. E. Newman 2011. Benchmark study on glyphosate-resistant cropping systems in the USA. III. Grower awareness, information sources, experiences, and management practices regarding glyphosate-resistant weeds. Pest Manag. Sci. 67:758770.

W. G. Johnson and K. D. Gibson 2006. Glyphosate-resistant weeds and resistance management strategies: an Indiana grower perspective. Weed Technol. 20:768772.

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G. R. Kruger , W. G. Johnson , S. C. Weller , et al. 2009. U.S. grower views on problematic weeds and changes in weed pressure in glyphosate-resistant corn, cotton, and soybean cropping systems. Weed Technol. 23:162166.

M. D. K. Owen , B. G. Young , D. R. Shaw , R. G. Wilson , D. L. Jordan , P. M. Dixon , and S. C. Weller 2011. Benchmark study on glyphosate-resistance crop systems in the United States. Part 2: Perspectives. Pest Manag. Sci. 67:747757.

J. M. Prince , D. R. Shaw , W. A. Givens , M. D. K. Owen , S. C. Weller , B. G. Young , R. G. Wilson , and D. L. Jordan 2012. Benchmark Study: I. Introduction, Weed Population, and Management Trends from the Benchmark Survey 2010. Weed Technol. 26:525530.

B. A. Scott and M. J. VanGessel 2007. Delaware soybean grower survey of glyphosate-resistant horseweed (Conyza canadensis). Weed Technol. 21:270274.

D. R. Shaw , W. A. Givens , L. A. Farno , et al. 2009. Using a grower survey to assess the benefits and challenges of glyphosate-resistant cropping systems for weed management in U.S. corn, cotton, and soybean. Weed Technol. 23:134149.

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Weed Technology
  • ISSN: 0890-037X
  • EISSN: 1550-2740
  • URL: /core/journals/weed-technology
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