Sunday, July 23, 2017

Rooting out latest invasive plant to strike Ottawa a race against time

Rosario Castanon, from the Rideau Valley Conservation Authority, says knotweed is aggressive. (Laurie Fagan/CBC) 

Conservation experts in Ottawa are waging war on Japanese knotweed, an aggressive, invasive plant species which has taken root in more than a dozen places on the city's shorelines.

If it's not controlled, biologists warn the foreign plant — strong enough to break through walls and roads — will spread, displacing wildlife and crowding out native plant species in many areas...

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