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Welcome to the University of Minnesota
Forest Resources Extension & Outreach

*If you have linked our website to another website, you may need to update your links as we have changed the names to pages within the new site. Contact us if you have questions: treeinfo@umn.edu

Forest Resources Extension & Outreach is committed to delivering high-quality educational programs and information to Minnesota citizens, communities and natural resource professionals. Contact our office if you have questions regarding tree/forest health and management. Visit some of our many online resources to find answers to questions as well. To navigate the site, use the tabs above to find a certain topic and the links on the left for specific information regarding that topic.

Emerald Ash Borer Information

Please visit this site for information on the Emerald Ash Borer

 

Oak Wilt Update

April 13, 2009

Status: HIGH RISK period

EXPECT NEXT UPDATE: JULY 6, 2009

FIELD NOTES: None

ADDITIONAL COMMENTS: Status based on estimated arrival or active dispersal of insect vectors in oak stands. Observed high and low temperatures and predicted temperatures are conducive for nitidulid beetle flight activity.

J. Juzwik
Northern Research Station, U.S. Forest Service


July Tree of the Month

Ginkgo Tree (Ginkgo biloba)

Also known as the Maidenhair tree, the commonly known Gingko tree is in a family of its own.  It is can be called a living fossil, with recognizably related fossils being dated back as far as 270 million years ago.  Two wild populations were said to exist in separate parts of China, though it is now believed that these populations were preserved by Chinese monks for over one thousand years.

Leaves

Ginkgos are large trees that can reach over 100 feet in height, with some even reaching heights over 150 feet.  While the branches tend to grow in a non uniform structure, the tree makes for a great yard or landscape tree.  Additionally, it is very resistant to wind damage and snow damage.

Fall Color

Ginkgo trees are extremely resistant to pests and pathogens, as well as a variety of harsh conditions, ultimately making them perfect for urban environments.  An extreme example of the tree’s hardiness is embodied in four trees in Hiroshima, Japan that were within 1-2 miles of the atomic bomb blast radius.  Some are still living today.

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Revised: 07/01/2009 Liam McClannahan, Stephen Schott, and Adam Flett at treeinfo@umn.edu.
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