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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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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Webinar: Forest health-Insects and disease in Minnesota

Click below to watch Minnesota DNR Forest Health Specialist Jana Albers’ May 2012 update on forest health threats in Minnesota: Watch the May 2012 presentation now. After watching, please fill in the quick 2012 feedback form. About the presentation:  This presentation, targeted to woodland owners but of interest to loggers and natural resource professionals as well, provides an up-to-date review of […]

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Stingless wasps released for possible emerald ash borer control

On September 22, 2010, the Minnesota Department of Agriculture (MDA) conducted the state’s first release of stingless wasps as a biological control in an effort to slow the spread of emerald ash borer (EAB) in Minnesota.  The release took place in the Upper Mississippi River Fish and Wildlife Area, in Houston County. Biological control, or biocontrol, is a pest control […]

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MN DNR Insect & Disease Newsletter June 2010

The Minnesota DNR has released a new Forest Insect and Disease Newsletter. This is a great source of timely, local information about what to look for in your woods. Get the June 2010 issue now. Here’s what you’ll find: What’s the buzz? Forest tent caterpillar Spruce budworm Summer shorts Pine root collar weevil Frost injury Diplodia in nursery stock Minimizing the […]

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MN DNR releases Spring 2010 Insect & Disease Newsletter

The Minnesota DNR has released a new Forest Insect and Disease Newsletter. This is a great source of timely, local information about what to look for in your woods. Get the spring 2010 issue now. Here’s what you’ll find: Forest tent caterpillars: 2010 update No defoliation predicted in northern counties West central counties show increasing defoliation And the story continues… […]

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Northern Minnesota phenology report: November 2009

By John Latimer, KAXE Radio, Grand Rapids The last of the meadowhawk dragonflies will put in an appearance in early November. These small, bright red, insects are among the last to fly about in the fall. A warm day or two in the early part of the month will send them out in a last and probably fruitless search for […]

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Minnesota forest insect & disease updates

Just a quick post in case you missed it: The Minnesota DNR, Division of Forestry has published the June 2009 Forest Insect & Disease Newsletter (PDF).  This is by far the best source of timely, quality information on insect and disease issues in the Minnesota woods. This summer’s issue includes a play-by-play of the discovery of emerald ash borer in […]

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