knapweed en Earth Notes: Controlling a Weed—With a Bug <p>When it comes to controlling the many non-native, invasive plants in northern Arizona, weed warriors call on every tactic in the book. As they seek to minimize the spread of a weed called diffuse knapweed, they&rsquo;re turning to a tiny ally: a weevil that loves to eat knapweed seeds.</p><p>Diffuse knapweed is a low-growing shrub that originated on the Russian steppes. Since the 1980&#39;s, it&rsquo;s taken over roadsides and pastures in the region. It&rsquo;s a heavy seed producer and a tough competitor against native plants.</p> Wed, 16 Nov 2011 16:29:31 +0000 Tristan Clum 4503 at Earth Notes: Controlling a Weed—With a Bug