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ND Invasive Species - Tree Pests

Current, relevant information for North Dakota communities, tree care professionals and natural resource professionals about invasive tree pest threats to our forests and shade trees.

What are Invasive Species?

An "invasive species" is defined as a species that:

is not native to the ecosystem under consideration and whose introduction
causes or is likely to cause harm to the economy, environment or human health. (Executive Order 13112).

Invasive species can be plants, animals, and other organisms (e.g., microbes). Human actions are the primary means of invasive species introductions.
Definition: USDA, National Invasive Species Information Center

How to Determine if a Tree is Affected

There are many different illnesses, insects, and environmental factors which may be negatively affecting the health of a tree. As such, sometimes it may be difficult to determine the root cause of tree ailment. If you know of or suspect that one or more of your trees is infected or has been affected by an Invasive Pest, or if you have questions about the health of a tree, please fill out the Sick Tree Assistance Survey found at this link - Sick Tree Assistance Survey.

Invasive Pest Threats

Below are some common examples of invasive pests which are spreading through various parts of North America. Many of these pests are being tracked or monitored as they pose a significant risk to the health of trees. As of now only Dutch Elm Disease has been confirmed as present in North Dakota; however some pests like Emerald Ash Bore (EAB) have been reported in areas near or around the state. Click on one of these invasive tree pests to learn more about the specific risks they pose to our trees:

EAB has reached Winnipeg, Manitoba.