title: US grower perceptions and experiences with glyphosate-resistant weeds.
abstract: BACKGROUND
  A survey of 400 growers of maize, soybeans and cotton was made in the United States to determine perceptions, experiences and management practices with glyphosate-resistant weeds. The survey included growers in the north (corn belt) and south (cotton belt) of the USA in spring 2006.
  
  
  RESULTS
  Interestingly, 24 and 39% of northern and southern growers, respectively, assumed they had glyphosate weed resistance on their farm. Of the 200 southern growers interviewed, 67% had planted continuous glyphosate-resistant (GR) crops for a period of 3-5 years. According to the survey respondents, the key method for managing glyphosate-resistant weeds was to rotate to other herbicides.
  
  
  CONCLUSIONS
  Growers do value GR crop technology but are adopting measures to manage resistance only as needed.
authors.affiliation: Syngenta Crop Protection, Inc., Greensboro, NC 27419, USA. chuck.foresman@Syngenta.com
authors.forename: Chuck
authors.initials: C
authors.lastname: Foresman
authors.forename: Les
authors.initials: L
authors.lastname: Glasgow
mesh_terms: D000383:Agriculture; D001290:Attitude; D001364:Awareness; D005998:Glycine / Q000031:analogs & derivatives*; D053209:Herbicide Resistance; D006540:Herbicides; D007407:Interviews as Topic; D010465:Perception; D010944:Plants; D030821:Plants, Genetically Modified; D014481:United States; D000097797:Glyphosate
chemical_list: D005998:Glycine; D006540:Herbicides; D000097797:Glyphosate