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Benchmark Study: IV. Survey of Grower Practices for Managing Glyphosate-Resistant Weed Populations

Published online by Cambridge University Press:  20 January 2017

Joby M. Prince
Affiliation:
Mississippi State University, Mississippi State, MS 39762
David R. Shaw*
Affiliation:
Mississippi State University, Mississippi State, MS 39762
Wade A. Givens
Affiliation:
Mississippi State University, Mississippi State, MS 39762
Micheal D. K. Owen
Affiliation:
Iowa State University, Ames, IA 50011
Stephen C. Weller
Affiliation:
Purdue University, West Lafayette, IN 47907
Bryan G. Young
Affiliation:
Southern Illinois University, Carbondale, IL 62901
Robert G. Wilson
Affiliation:
University of Nebraska, Scotts Bluff, NE 69361
David L. Jordan
Affiliation:
North Carolina State University, Raleigh, NC 27695
*
Corresponding author's E-mail: dshaw@research.msstate.edu

Abstract

In 2010, a grower survey was administered to 1,299 growers in 22 states to determine changes in weed management in the United States from 2006 to 2009. The majority of growers had not changed weed management practices in the previous 3 yr; however, 75% reported using weed management practices targeted at glyphosate-resistant (GR) weeds. Growers were asked to rate their efforts at controlling GR weeds and rate the effectiveness of various practices for controlling/preventing GR weeds regardless of whether they were personally using them. Using the herbicide labeled rate, scouting fields, and rotating crops were among the practices considered by growers as most effective in managing GR weeds. Sixty-seven percent of growers reported effective management of GR weeds. Between the 2005 and 2010 Benchmark surveys, the frequency of growers using specific actions to manage GR weeds increased markedly. Although the relative effectiveness of practices, as perceived by growers, remained the same, the effectiveness rating of tillage and the use of residual and POST herbicides increased.

En 2010, se practicó una encuesta a 1299 productores en 22 estados para determinar los cambios en el manejo de malezas en los Estados Unidos de 2006 a 2009. La mayoría de los productores no había cambiado sus prácticas en el manejo de malezas los tres años anteriores; sin embargo, el 75% reportó el uso de prácticas dirigidas a las malezas resistentes a glyphosate (GR). Se les pidió a los productores evaluar sus esfuerzos en el control de malezas GR y calificar la efectividad de varias prácticas para controlar/prevenir malezas GR, sin importar si ellos las estaban usando personalmente. Usar la dosis recomendada, muestrear los campos y rotar los cultivos estuvieron entre las prácticas consideradas por los productores como las más eficaces en el manejo de malezas GR. El sesenta y siete por ciento de los productores reportó un manejo efectivo de malezas GR. Entre las encuestas de referencia de 2005 y 2010 se incrementó notablemente la frecuencia del uso por parte de los productores de acciones específicas para manejar malezas GR. Aunque la percepción de los productores de la efectividad relativa de las prácticas permaneció igual, se incrementó la calificación de la efectividad del uso de labranza y de herbicidas residuales y pos emergentes.

Type
Education/Extension
Copyright
Copyright © Weed Science Society of America 

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