Reflections on the 2014 Upper Midwest Invasive Species Conference

by UMN Extension Forestry Staff In October, members of the UMN Extension forestry team joined over 600 representatives from natural resource management groups, government agencies, universities, and other organizations at the 2014 Upper Midwest Invasive Species Conference in Duluth, MN. It was a great event to learn about the current status and trends in managing terrestrial and aquatic invasive species […]

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Diseases and Insect Pests of Conifers (Evergreen trees) – by species

Douglas-Fir (Pseudotsuga): Armillaria Root Disease USFS Armillaria Root Rot Christmas Tree Pest Manual (USFS) Disease Management Recommendations for Trees and Shrubs (Swiss Needlecast) Dwarfmistletoe of Douglas-fir Insecticide Suggestions to Manage Landscape Tree and Shrub Insects HOW to Identify and Control Rhabdocline and Swiss Needlecasts of Douglas-Fir (USFS) Fir (Abies): Armillaria Root Disease USFS Armillaria Root Rot Christmas Tree Pest Manual […]

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Diseases and Insect Pests of Hardwoods (Broadleaf trees) – by species

Apple/Crabapple (Malus): Aphids on Deciduous Trees and Shrubs Apple Maggot Management Apple Scab Disease Management Recommendations for Trees and Shrubs (Black Rot Canker, Cedar-Apple Rust, Fireblight, Frog-eye Leaf Spot, Powdery Mildew, and Apple Scab) Fireblight Forest Tent Caterpillars in Minnesota Forest Tent Caterpillar (USFS) Gypsy Moth (USFS) Gypsy Moth in Minnesota (MNDNR) Insecticide Suggestions to Manage Landscape Tree and Shrub […]

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Four actions for better forest management: A Minnesota perspective

by Matt Russell Last month, Eli Sagor introduced me to the MyMinnesotaWoods team and I’m excited to be aboard! In my new role with the U of M Department of Forest Resources and Extension I’ll be addressing forest ecosystem health issues for forest landowners and natural resource professionals across Minnesota. A recent report by Steve Shifley and colleagues from the US Forest […]

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Winter cold impacts on EAB: Minnesota data

By Eli Sagor, University of Minnesota Extension A few weeks ago the local and national media ran a number of hopeful stories about the effect of this year’s deep cold on EAB larvae overwintering under ash bark. We got in on it too: Will winter cold save us from emerald ash borer? Sensing perhaps a bit too much optimism, last week Dr. […]

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Will winter cold save us from emerald ash borer?

By Eli Sagor, University of Minnesota Extension Emerald ash borer is now established in Minnesota and poses a serious threat to our huge population of ash trees. As we shiver through this week’s “polar vortex fueled arctic superfront,” some have taken comfort from recent research suggesting that the cold may wipe out up to 80% of emerald ash borer larvae […]

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KAXE Radio’s Watch Your Ash campaign

We’re pleased to be working with KAXE Northern Community Radio and the Itasca County Private Woodlands Committee to get the word out about emerald ash borer and the threat it poses to Minnesota ash trees.  This spring, KAXE is offering a special Watch Your Ash shirt for some donors and encouraging listeners to do what they can to keep EAB […]

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Know thy woods: On the value of monitoring

You may have noticed a lot of talk on MyMinnesotaWoods about forest health and phenology. There’s a common theme and a good reason for this: There are a lot of good reasons to monitor your woods through the weeks, months, years, and even decades: 1. Trees and woodland stands are constantly changing. Trees have to grow to live, and big […]

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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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