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Keyword: invasive plant

Costs of induced defenses for the invasive plant houndstongue (Cynoglossum officinale L.) and the potential importance for weed biocontrol

Publications Posted on: September 28, 2016
Inducible plant defenses - those produced in response to herbivore feeding - are thought to have evolved as a cost-saving tactic that allows plants to enact defenses only when needed. The costs of defense can be significant, and loss of plant fitness due to commitment of resources to induced defenses could affect plant populations and play a role in determining the success or failure of weed biocontrol.

Weed management can result in unintentional secondary invasion

Science Spotlights Posted on: August 19, 2016
A rapidly emerging problem is that of secondary invasion – an increase in non-target exotics following efforts to suppress targeted invasive plants. Researchers conducted a global literature review and meta-analysis directed at quantifying the magnitude of secondary invasion effects and identifying possible causes in order to improve management outcomes. 

Secondary invasion: The bane of weed management

Publications Posted on: April 21, 2016
Exotic plant invasions present a global threat to natural ecosystems, yet the efficacy of management efforts in mitigating invader impacts remains unclear. A rapidly emerging problem is that of secondary invasion — an increase in abundance of non-target exotics following treatment of targeted invasive plants.

Population dynamics and impacts of the red-headed leafy spurge stem borer on leafy spurge

Publications Posted on: September 25, 2013
We evaluated the efficacy of the biological control agent, red-headed leafy spurge stem borer (Oberea erythrocephala Schrank.) against the nonnative invasive plant leafy spurge (Euphorbia esula L.). Our three treatments were release of the biological control agent into uncaged plots, release of the biological control agent into plots caged to prevent agent escape and control plots caged to prevent agent entry.

Hybridization between invasive populations of Dalmatian toadflax (Linaria dalmatica) and yellow toadflax (Linaria vulgaris)

Publications Posted on: December 23, 2009
Although there is evidence that interspecific hybridization can initiate invasion by nonnative plants, there are few documented examples of novel hybridization events between introduced plant species already exhibiting invasive behavior. We conducted morphometric and molecular analyses of toadflax plants with intermediate morphology found at two sites in Montana, which were co-invaded by yellow toadflax and Dalmatian toadflax.