2009-05-022009-05-021989https://hdl.handle.net/10365/3957Weeds.Insects.Biological pest control agents.Leafy spurge.History of the biological control of leafy spurge (Euphorbia esula L.) in the United States1989 Leafy Spurge Symposium Proceedings; Bozeman, MT; July 12-13, 1989