Copyright (c) 2013 Utah State University All rights reserved. http://digitalcommons.usu.edu/govdocs_pesticides Recent documents in Herbicides and Pesticides en-us Sun, 27 Jan 2013 04:27:01 PST 3600 http://digitalcommons.usu.edu/govdocs_pesticides/1 http://digitalcommons.usu.edu/govdocs_pesticides/1 Tue, 28 Dec 2010 11:19:21 PST Herbicides were applied to four west-central Montana sites with light to moderate spotted knapweed (Centaurea maculosa Lam.) infestations. Althought knapweed suppression was high, 2 years after the spraying the communities were not converted to grass monocultures. No large declines in plant diversity were caused by the herbicides, and small depressions were probably transitory. By the third year, diversity had increased.

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