1. Effects of site characteristics and release history on establishment of Agapeta zoegana (Lepidoptera: Cochylidae) and Cyphocleonus achates (Coleoptera: Curculionidae), root-feeding herbivores of spotted knapweed, Centaurea maculosa;Clark;Biol. Control,2001
2. Effects of root feeding insects on spotted knapweed (Centaurea maculosa) stand density;Clark;Southwest. Entomol.,2001
3. Duncan, C., 2001. Knapweed management: another decade of change. In: Smith, L. (Ed). Proceedings of the First International Knapweed Symposium of the 21st century. Coeur d’Alene, 15–16 March 2001, ID. Department of Agriculture, Agricultural Research Service, Albany, CA, US, pp. 1–7.
4. Classical biocontrol of weeds: its definition, selection of effective agents, and administrative-political problems;Harris;Can. Entomol.,1991
5. Hirsch, S.A., Leitch, J.A., 1996. The Impact of Knapweed on Montana’s Economy. Agricultural Economics Report No. 355. North Dakota Agricultural Experiment Station. Fargo, North Dakota.