Acknowledgements

Special acknowledgment and thanks are due to the following for their support of the Weed Science Research Program, Department of Agronomy, Iowa State University: 

• Iowa State University Extension

• Iowa State University Agricultural Experiment Station

• AgrEvo USA Company

• American Cyanamid Company

• Asgrow Seed Company

• BASF Corporation

• Bayer Corporation

• Cheminova, Inc.

• Committee for Agricultural Development

• DeKalb Seed Company

• Dow AgroSciences

• E.I. Dupont de Nemours and Company

• Entek

• FMC Corporation

• Garst Seed Company

• LABServices

• Midwest Valley/Loveland Industries

• Monsanto Chemical Company

• Na-Churs

• Novartis

• Pioneer Hybrid International

• Rhone-Poulenc Chemical Company

• Spraying Systems Company

• Terra Industries, Inc.

• United Agri Products

• Valent USA Corporation

• WilFarm L.L.C.

• Zeneca Agricultural Products

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