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Spotted Knapweed
Centaurea Stoebe
Why is it a problem?
Spotted knapweed, introduced to the U.S. from Eurasia, is a threat to our dune areas, and other dry ecosystems. This invasive species releases toxins that inhibit the growth of native plants, leading to less biodiversity in these vital habitats. Additionally, it can cause skin irritation in some individuals.
How to Identify it?
Spotted knapweed is a bushy herbaceous plant that reaches heights of 2 to 3 feet. It features elongated, bluish-silver leaves with lance-shaped lobes. From July to September, it produces a thistle-like flowers that is of purplish-pink.
How to Manage it?
Monitoring small populations and hand-pulling them is an effective way to control their spread. For larger populations, mechanical removal and consistent management efforts can help keep them in check.
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