Help requested: Look for and report diseased buckthorn

Forwarding a request from Laura Van Riper, MN DNR’s Terrestrial Invasive Species Coordinator.  A ray of hope for buckthorn control!? Hello, As you are out and about this summer, could you keep a lookout for common/European buckthorn trees with witches’ broom/yellows disease symptoms?  Research to identify biocontrol insects for buckthorn has been on-going since 2001. A phytoplasma disease was detected in potential […]

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Garlic mustard: A Minnesota woodland owner’s story

Garlic mustard is an exotic invasive plant in Minnesota.  Where well established, it can seriously inhibit regeneration and growth of not only understory plants, but also trees.  In this video Delano, Minnesota landowner John Peterson shares his story about working to control garlic mustard in his woodland. Below John’s video, you’ll also find a video and links with more technical […]

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Fertilizer and -Cide Application

Fertilizer Applications: Tree Fertilization: A Guide for Fertililzing New and Established Trees in the Landscape This page provides information to determine the need for a fertilizer, the right time to apply and how much at a given time. Manufactured vs. Natural Fertilizers   Pesticide/Insecticide/Herbicide Applications: How to Calculate Herbicide Rates; Calibrate Herbicide Applicators Insecticide Suggestions to Manage Landscape Tree and […]

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Woodland invasive species in Minnesota

Some of the most common invasive species in Minnesota’s woods include buckthorn, garlic mustard, Dutch elm disease and the emerald ash borer. Others that might not come to mind could be earthworms or Gypsy moths. All of these species are non-native and are causing significant damage in Minnesota’s forests. You can find identification guides to common invasive species at the DNR invasive species index.

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