Posted by: csdailyblog | April 12, 2010

Getting the Jump on Invasive Species

Megan, Jaclyn, Jake, and Bace advance on the thistle population.

Emily surveys the trails for emerging thistle plants.

Conserve School students have started removing Canada Thistle from the campus trails and woods.  This invasive species, which, despite its name is European in origin, is a tough and vigorous grower and quickly out-competes daintier non-exotic species. Later this month, students will return to replant the area.  

In early spring, the first plants to emerge are often the invasive species. This early emergence  is one of the characteristics that typically give invasive species an advantage.  In one class period, students killed about 2,000 – 3,000 of these plants, using targeted applications of a herbicide that breaks down quickly. Thistles are so difficult to kill that herbicides are the only way to deal with large patches effectively. 


Jake and Bace make sure there's one less Canada Thistle on campus.

Jaclyn takes aim.



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