2009-05-062009-05-061994https://hdl.handle.net/10365/4104Insects.Biological pest control agents.Leafy spurge.Weeds.Status of biocontrol research projects in North Dakota with special reference to Aphthona spp. and the gall midge, Spurgia1994 Leafy Spurge Symposium Proceedings; Bozeman, MT; July 26-29, 1994