Month: December 2019

White spruce seedlings available

Good news for forest landowners who want to plant white spruce this spring; we now have some 3-year-old white spruce seedlings available!

When the DNR reforestation program’s seedlings went on sale this past October, there was a smaller quantity of white spruce seedlings available for purchase than usual. A long, cold, snowy winter in 2018 at our seedling nursery in Boscobel and a cool, wet spring combined to adversely impact our newly germinating and young white spruce seedlings. White spruce is also one of our best sellers, as landowners enjoy the white spruce’s resistance to deer browse, moderate growth, tolerance to some shade and ability to grow in many soil types. This combination of low supply and high demand meant the available trees sold out quickly.

However, we recently learned that Minnesota DNR has a surplus of white spruce, so we were able to acquire some of their extra inventory for our customers. Wisconsin statutes allow for the exchange of seedlings between other state and USDA Forest Service nurseries as long as the seed used to grow the seedlings is appropriate for Wisconsin. In this case, the white spruce seed was from southern Minnesota and the seedlings are very appropriate for planting in Wisconsin.

The only caveat is that the Minnesota nursery is quite far north so the spruce seedlings will be available later in the spring, probably early May. If you would like to purchase white spruce or any other tree or shrub seedlings, please visit us at https://dnr.wi.gov/topic/TreePlanting/ or contact our nursery staff at (715) 424-3700.

New map illustrates damage from EAB

Forest health staff recently produced a map that highlights a gradient of damage from southeastern to northwestern Wisconsin, which roughly corresponds to the length of time EAB has been present in these parts of the state. Whatever the level of damage, homeowners and landowners should consider treating healthy ash, including trees that have responded well to previous treatments, or removing declining, untreated ash before they become hazardous and even more costly to remove.

County-level map of damage from EAB to ash tree populations in 2019

County-level assessment of damage to ash population by emerald ash borer, 2019.

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Invasive plants, ticks and you

Most people are familiar with the impacts of invasive plants to natural areas, but did you know that invasive plants can be hazardous to human health? Did you also know there is a new app available to learn about tick activity near you and help researchers by recording your own tick encounters?Forested setting with tree in foreground and sign attached to tree that says beware of ticks. Continue reading “Invasive plants, ticks and you”

Leaf beetle spreading in southern Wisconsin

Mike Hillstrom, forest health specialist, Fitchburg, Michael.Hillstrom@wisconsin.gov, 608-513-7690

Viburnum leaf beetle is a relatively new invasive insect from Europe that feeds on the leaves of viburnums and causes mortality after a few years of repeated defoliation. Along with the killing of native viburnum species, which are highly susceptible to the pest, impacts include a higher likelihood of invasive species becoming established following the mortality. Continue reading “Leaf beetle spreading in southern Wisconsin”

Pine wood nematode in Waushara County

By Alex Feltmeyer, forest health specialist, Plover, alexandra.feltmeyer@wisconsin.gov, 715-340-3810

Pine wood nematode (PWN) was recently found to be infecting Scotch pine in Waushara County. Symptoms of pine wood nematode include rapid crown browning (within 3 months) in late summer, rapid drying of wood and presence of blue-stain fungi in the wood.

Row of pine trees with browning needles from pine wood nematode infestation.

Symptomatic trees dying from pine wood nematode. Photo by Alex Feltmeyer. 

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