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Invasive Species


"An ounce of prevention is worth a pound of cure." - Benjamin Franklin


Voluntary Codes of Conduct

Findings and Principles About Invasives

Invasive Species Information

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What are invasive plants? An invasive plant is defined as an alien species whose introduction does or is likely to cause economic or environmental harm or harm to human health. Invasive species typically harm native species through habitat degradation and competition for shared resources.

Some plants may look beautiful, but they can have a devastating effect. Non-native invasive species are a threat to biodiversity in the United States. Unchecked, invasives lead to the destruction of natural areas, force native species into extinction and can cost billions of dollars in damage to agriculture and infrastructure.

Voluntary Codes of Conduct established: Representatives from several groups attended workshops in St. Louis and Chicago to explore and develop workable voluntary approaches to reduce the introduction and spread of non-native invasive plants. They endorsed principles to help curb invasives which we refer to as the Voluntary Codes of Conduct.

You can see the Codes of Conduct, the workshop proceedings and invasive species information from the links on the left.

Please consider endorsing the Voluntary Codes
if you have not done so.

Click on the image below to download CPC's Invasive Species brochure.


Japanese knotweed
Japanese knotweed is a widespread invasive plant found in about 40 states. It forms thick, dense colonies that completely crowd out native plant species and has roots that are strong enough to damage concrete, buildings, pavement, etc.

Japanese knotweed from inside
A view from inside a mass of Japanese knotweed shows how this plant can completely dominate an area.

Photos by Cornell Plantations


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