The memory of trees in a modern climate: epigenetics

Several recent articles on MyMinnesotaWoods have discussed the need to recognize seed zones in reforestation efforts to avoid the consequences of moving seed too far. There are several good reasons outlined in these articles. You might be surprised to learn of another reason: trees maintain a memory of their origin that helps them adapt to their local conditions. In this article I will […]

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What is an “improved” tree?

Planting trees is a rite of spring for many people in Minnesota.  But a lot can go wrong, and the success of your tree planting hinges on many factors.  One that is often overlooked is the seed source.  The quality of seed and seedlings used for reforestation can impact the long-term success of your planting.   Many of the future traits […]

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Bur oak blight (BOB) in Minnesota

By Jill Pokorny, United States Forest Service Update:  Here’s a May 2011 PDF fact sheet on bur oak blight (BOB), including identification and management considerations. Minnesota tree care companies, their arborists, and urban forestry professionals are advised to be on the lookout for a newly discovered disease of bur oaks. The first bonafide case of bur oak blight (BOB), confirmed […]

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Tree Stem Protection

Benjamin K. Cooper, Undergraduate Research Assistant * Gary R. Johnson, Associate Professor, Urban and Community Forestry * Tree stem protection, commonly referred to as tree wraps, can serve two basic functions: stem protection from physical (mechanical) damage and modify the stem’s ambient environment. Physical or mechanical protection may protect the stem from equipment, animal, vandalism and herbicide damage. The stem-ambient […]

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Stem Girdling Roots: The underground epidemic killing our trees

Download Stem Girdling Roots: The underground epidemic killing our trees (PDF) Gary Johnson, Professor, Urban and Community Forestry, Department of Forest Resources, St. Paul, MN; Dennis Fallon, Vegetation Management Coordinator, Xcel Energy; Andrew Rose, Creative Director, Hand/Eye Communications. How many trees die prematurely each year? Thousands? Millions? Billions? It’s almost impossible to pinpoint, but one unseen culprit – dysfunctional (abnormal) […]

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Finding tree care help: Certified arborists and MN Tree Care Advisors

The following links are useful when looking to hire an arborist or find out more information on arborists. For information on hiring a tree care professional visit:  Hiring an Arborist. This page provides information on when a professional should be hired and important considerations when choosing one. To find a certified arborist in your area visit:   ISA Certified Arborist Search. […]

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Protecting Trees From Construction Damage

A Homeowner’s Guide This publication by Gary R. Johnson discusses construction damage to trees.  It explains how trees can be damaged, symptoms of damage, how to minimize construction damage to you trees, how to minimize damage by planning ahead, and which trees are most tolerant to construction. View the publication: Protecting Trees From Construction Damage: A Homeowner’s Guide. Emily HansonEmily […]

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Sidewalk and Tree Conflicts

To Care for Trees IS to Care for Sidewalks By Becky Mellentin and Lorrie Stromme, reviewed by MPRB. Based on research from May through July, 2000, by Northeast Minneapolis residents and property owners, and with cooperation from Minneapolis Public Works, the Minneapolis Park & Recreation Board and its Forestry Division. Work on public sidewalks, curbs, and driveways by City-hired and private […]

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Winter Damage to Trees and Shrubs: Good sources of info

It’s not just the cold!  Trees also have to survive salt, ice, de-icers, hungry wildlife, and more.  Here are a few good pubs on preventing winter damage to trees from these and other sources: Protecting Trees and Shrubs Against Winter Damage, a publication by Bert T. Swanson and Richard Rideout, University of Minnesota. This publication discusses damage to trees from […]

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