Invasive Plants

What is an Invasive Species?

Invasive species are non-native species that can cause harm to the environment, the economy or to human health. Invasives come from all around the world. As international trade increases, so does the rate of invasive species introductions. Invasive species are one of the greatest threats to New York's biodiversity. They cause or contribute to: habitat degradation and loss; the loss of native fish, wildlife and tree species; the loss of recreational opportunities and income; and crop damage and diseases in humans and livestock ( from the New York Dept. of Environmental Conservation).

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Giant Hogweed

Giant hogweed is one of New York's most striking and dangerous invasive plants. Learn how to recognize and manage it safely on our site.

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Black swallowwort

Swallow Wort

Areas that have been cleared of swallow-wort should be planted with rapid-growing native species to avoid introduction of other invasive plants.

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Bush honeysuckle

What are those berries?

Exotic bush honeysuckle is perhaps the most widespread exotic invasive in the U.S. Widely dispersed by birds, it is now found in at least 38 states.

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Japanese stiltgrass

Japanese Stiltgrass

Thought to have been introduced as packing material in crates from China, Japanese stiltgrass can grow in a variety of habitats.

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Oriental bittersweet2

Oriental Bittersweet

Introduced in the 1860s as an ornamental and for erosion control, Oriental Bittersweet is a vine that smothers plants and uproots trees due to its weight.

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Common buckthorn2

Invasive Species Survey

Help us determine the affect of invasive species on your well-being and livelihood. Visit our Common Buckthorn page and click on the survey link in the right red sidebar. For more information on invasive species, visit the pages under Gardening.

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Contact

Sue Gwise
Horticulture and Natural Resouces Educator
Sjg42@cornell.edu
315-788-8450 ext. 243

Last updated June 20, 2017