Month: December 2017

Another productive year for WI Urban Forestry!

By Jeff Roe, Urban Forestry Team Leader

urban forestry teamAs I reflect on the last year, what stands out most for me is the great people that I work with – both staff and partners!

This has been a year of change, with new structures and leadership within the agency. Nonetheless, the staff dedication and leadership support for our program, and the work we do, remain strong. We have also had some staff changes this year: we added a new coordinator to the team, Brad Johnson, to serve the West Central area of the state; Bobbi and Dan joined the team to help with grants and the urban assessment program, respectively; and later in the year, Bobbi moved on to a full-time position within another DNR program. Continue reading “Another productive year for WI Urban Forestry!”

Urban Forestry, Green Tier and the League of Wisconsin Municipalities

By Laura Lorentz, DNR Urban Forestry Partnership and Policy Specialist

This past October Will Erikson, of DNR’s Green Tier Legacy Community (GTLC) program, and I staffed a booth at the 119th League of Wisconsin Municipalities (the League) Annual Conference in Appleton. Each year the three-day conference attracts hundreds of municipal professionals; among them elected officials, directors of parks and forestry, city engineers, and consultants. Continue reading “Urban Forestry, Green Tier and the League of Wisconsin Municipalities”

Comments sought re: change in gypsy moth rule

Aerial spraying of Btk for gypsy moths.

Aerial spraying for control of gypsy moths. Photo: John Ghent,

The WI DNR is proposing to deactivate the gypsy moth suppression program as requests for treatment have fallen to very low levels and this small need can be met by private businesses. The DNR is taking input on the proposed change to rule NR 47.910. If you have questions, concerns, or comments about this proposal you may give your input by attending a hearing or in writing. Input must be received on or before Tuesday, Dec. 19, 2017 to be considered.

Public hearings will be held on Dec. 19, at 11:00 a.m. at DNR service centers in Fitchburg, Milwaukee, Green Bay and Eau Claire. Input may be given verbally or in writing at the hearing.

Written comments may be submitted by U.S. mail, e-mail, or through the internet. Written comments will have the same weight and effect as oral statements presented at the public hearing.

E-mail comments may be made at: (Please include “Attn: Andrea Diss-Torrance” in subject line.)

Written comments and any questions on the proposed rules should be submitted to:
Department of Natural Resources
Attn: Andrea Diss-Torrance
P.O. Box 7921
Madison, WI 53707-7921

Written by: Andrea Diss-Torrance, invasive forest insects program coordinator, Madison.; 608-264-9247

Pesticide applicator training offered in 2018

The University of Wisconsin Pesticide Applicator Training (PAT) Program will offer two training sessions for forestry training (Category 2.0) in 2018. The trainings, which will each last one day and be conducted indoors, offer attendees an opportunity to review materials in the PAT training manual. The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) will administer a certification exam at the end of each session.  Dates and locations of the training sessions are:

Preregistration is required. The cost to attend a training session is $30.  For more information, visit UW Extension’s website.  

Written by: Kyoko Scanlon, forest pathologist, Fitchburg.; 608-275-3275

Gypsy moth numbers rising in northern WI


Fig 1. Average gypsy moth trap counts in northern Wisconsin counties. Map credit: Adapted, Slow The Spread Foundation, Inc.

Fig 1. Average gypsy moth trap counts in northern Wisconsin counties. Map adapted from the Slow The Spread Foundation, Inc.

Annual surveys conducted by the Wisconsin Department of Agriculture, Trade, and Consumer Protection (DATCP) indicate gypsy moth populations have increased in several northern Wisconsin counties and by 20% statewide. High moth counts were detected in pheromone traps in Ashland, Bayfield, Burnett (Dewey Township), Iron, Oneida, and Vilas counties, with the highest overall count in Bayfield County (14,354 moths total).  Areas with an average catch per trap of 100 moths or more will likely experience damaging levels of defoliation by gypsy moth caterpillars in the following year or years (Fig. 1).

Defoliation can be reliably predicted at the stand level by counting gypsy moth egg masses from August through March before egg hatch; these estimates help determine if preventive measures, such as physical controls, insecticide treatments, or delaying thinning activities are needed until populations collapse. 

In recreational and residential high-use areas, physical controls such as sticky bands and burlap barriers may be used to help reduce nuisance and aesthetic impacts from gypsy moths.  Aerial treatments are used when gypsy moth populations are high. In managed forests, use of silvicultural techniques may be economically feasible to reduce productivity problems caused by the pest.

Learn more about prevention and management options for your property by consulting with your local DNR forester or regional forest health specialist.

More information about population sampling and management options is available online at

Written by: Paul Cigan, forest health specialist, Hayward.; 715-416-4920

Recent finds of emerald ash borer in WI

Emerald ash borer (EAB) continues to be found in new areas in the state. Wisconsin tracks EAB at the municipality or township level. Quarantined counties are shown in tan; infested areas are shown in green on the map.

New county quarantines

EAB quarantine map. Counties shaded in tan are quarantined for EAB, green areas are townships and municipalities where EAB has been confirmed. Map courtesy of WI DATCP.

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New finds in counties already quarantined

  • Monroe County — Town of New Lyme
  • Richland County — City of Richland Center

Written by: Linda Williams, forest health specialist, Woodruff.; 715-356-5211, x232

Updated forest health fact sheet – conifer bark beetle

Spruce beetle (Dendroctonus rufipennis)

Spruce beetle (Dendroctonus rufipennis). Photo: Edward H. Holsten, USDA FS,

The Division of Forestry’s forest health team recently updated another forest health fact sheet about conifer bark beetles. Like the oak wilt and hickory dieback and mortality fact sheets revised earlier this year, the conifer bark beetle publication offers information about biology, impact, prevention and management of the insects. The conifer bark beetle fact sheet is available on the DNR’s forest health webpage.

Written by: Mike Hillstrom, forest health specialist, Wisconsin Dells.; 608-513-7690

Is it SNEED or wet soils and nutrient deficiency?

New needles are green (circled in red), and older needles are yellow (circled in blue) on this spruce. Spruce needles that are yellow, with no visible fruiting bodies on the needles, may be suffering from nutrient deficiency due to the constant wet soils this year, or they may have a disease called SNEED (spruce needle drop). Photo by Linda Williams, WI DNR.

New needles are green (circled in red), and older needles are yellow (circled in blue) on this spruce. Spruce needles that are yellow with no visible fruiting bodies on the needles may be suffering from nutrient deficiency due to constant wet soils this year, or they may have a fungal disease called SNEED (spruce needle drop). Photo by Linda Williams, WI DNR.

In late summer and early fall I had a few calls about younger spruce with yellow needles.  These trees were typically 8-20 years old and were a very yellow color, with new foliage emerging a green color but quickly fading to yellow.  There are two things that came to mind this year.  The first thought is that we’ve had a very wet year.  All year long roots were often in saturated or very moist soil. Consequently. the yellowing could be a sign of nutrient deficiency, specifically nitrogen, due to the saturated soils.  The second possibility is a disease called SNEED (an abbreviation for ‘spruce needle drop’), which I typically see on heavier soils. 

SNEED in spruce is thought to be caused by the fungus Setomalonomma holmii.  Pathogenicity of the fungus has not been proven, but it is the primary fungus present on trees with a particular suite of symptoms.  Spruce with SNEED have current year needles that are a nice green color, but older needles will be yellow or yellow/green in color.  Black fruiting bodies will look like pepper sprinkled generously on the twigs of the affected branches.  Old needles, although not showing any fruiting bodies, will drop from the tree prematurely, and repeated years of this will cause the tree to thin, decline, and can lead to mortality.  I’ve seen this primarily in plantations of white spruce on heavy soils, but have also seen it in blue spruce plantations; it’s reported in Norway spruce as well.  I don’t know of any sure-fire chemical options to prevent infection or to help the trees recover.  Management typically involves removing the most affected trees in the plantation, minimizing stress, and minimizing standing water or waterlogged soils where possible. 

 Written by: Linda Williams, forest health specialist, Woodruff.; 715-356-5211, x232.