title: Benchmark study on glyphosate-resistant crop systems in the United States. Part 2: Perspectives.
abstract: A six-state, 5 year field project was initiated in 2006 to study weed management methods that foster the sustainability of genetically engineered (GE) glyphosate-resistant (GR) crop systems. The benchmark study field-scale experiments were initiated following a survey, conducted in the winter of 2005-2006, of farmer opinions on weed management practices and their views on GR weeds and management tactics. The main survey findings supported the premise that growers were generally less aware of the significance of evolved herbicide resistance and did not have a high recognition of the strong selection pressure from herbicides on the evolution of herbicide-resistant (HR) weeds. The results of the benchmark study survey indicated that there are educational challenges to implement sustainable GR-based crop systems and helped guide the development of the field-scale benchmark study. Paramount is the need to develop consistent and clearly articulated science-based management recommendations that enable farmers to reduce the potential for HR weeds. This paper provides background perspectives about the use of GR crops, the impact of these crops and an overview of different opinions about the use of GR crops on agriculture and society, as well as defining how the benchmark study will address these issues.
authors: Agronomy Department, Iowa State University, Ames, IA 50011, USA. mdowen@iastate.edu
authors: Micheal D K
authors: MD
authors: Owen
authors: Bryan G
authors: BG
authors: Young
authors: David R
authors: DR
authors: Shaw
authors: Robert G
authors: RG
authors: Wilson
authors: David L
authors: DL
authors: Jordan
authors: Philip M
authors: PM
authors: Dixon
authors: Stephen C
authors: SC
authors: Weller
mesh_terms: D000383:Agriculture / Q000379:methods*; D019985:Benchmarking; D018556:Crops, Agricultural / Q000187:drug effects* / Q000235:genetics / Q000254:growth & development; D005998:Glycine / Q000031:analogs & derivatives* / Q000494:pharmacology; D053209:Herbicide Resistance; D006540:Herbicides / Q000494:pharmacology*; D030821:Plants, Genetically Modified / Q000187:drug effects / Q000235:genetics / Q000254:growth & development; D014481:United States; D058728:Weed Control; D000097797:Glyphosate
chemical_list: D005998:Glycine; D006540:Herbicides; D000097797:Glyphosate