"Ask The Expert" List For The Media

Listed Alphabetically By Category

Printable Version  
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Topic

Name of Expert

Title

Phone Number

Email Address

  Tree Care:

Cabling or Bracing Trees

Gary Wemeier
Northern Arborists

Certified Arborist

651-436-1367

  

Climbing Trees

       

Construction Damage

* Gary Johnson
U of MN - Urban Forestry

Professor

612-625-3765

grjonson@umn.edu

* Jean Mouelle
MnDNR

Forestry Specialist

651-772-7925

jean.mouelle@dnr.
state.mn.us

Drought:
Impact on Trees

Patrick Weicherding 
Anoka County Extension

Extension Educator

763-755-1280

weich002@umn.edu

Jim Zwack
Rainbow Treecare

Research Development

952-922-3810

jzwack@rainbow
treecare.com

Emergency Response

Katie Himanga
Heartwood Forestry

Consulting Forester

651-380-9680

khimanga@earthlink.net
www.heartwoodforestry.com

Evergreen Browning:
Winter Injury

Gary Johnson
U of MN – Urban Forestry

Professor

612-625-3765

grjonson@umn.edu

Sue Burks, MnDNR

Forest Health Specialist

651-772-7927

susan.burks@dnr.
state.mn.us

Flooding:
Impacts on Trees

Jill Pokorny
US Forest Service

Plant Pathologist

651-649-5247

jpokorny@fs.fed.us

Herbicide Injury

Jill Pokorny
US Forest Service

Plant Pathologist

651-649-5247

jpokorny@fs.fed.us

Maple Syrup Production

Carl Vogt,
U of MN

Instructor

612-624-3639

vogtx001@umn.edu

Moving Large Trees

Gregg Hove
City of Eagan

City Forester

651-675-5300

ghove@ci.eagan.mn.us

Planting Techniques

Don Mueller
MnDNR

Forest Health

651-772-6148

don.mueller@dnr.
state.mn.us

Pruning, Trimming

Joe O'Brien, 
US Forest Service

Plant Pathologist

651-649-5266

jobrien@fs.fed.us

Mark Stennes,
S&S Tree and Horticultural Specialists

Plant Pathologist

651-451-8907

treespeak@aol.com

Pruning, Trimming:
Utility Line Trees

Fletcher Johnson
Xcel Energy

Vegetation Management Supervisor

651-639-4590

Fletcher.L.Johnson@
xcelenergy.com

Root Health:
Girdling Roots and Pavement Problems

Gary Johnson
U of MN Urban Forestry

Professor

612-625-3765

grjonson@umn.edu

Salt Injury (deicing salt)

Gary Johnson
U of MN Urban Forestry

Professor

612-625-3765

grjonson@umn.edu

Linda Haugen, USFS

Plant
Pathologist

651-649-5029

lhaugen@fs.fed.us

Jana Albers
MnDNR, Grand Rapids

Forestry Regional Specialist

218-327-4234

jana.albers@dnr.
state.mn.us

Storm Damage: 
Ice, Snow, Wind

Ben Johnson
Rainbow Treecare

Research & Development

952-922-3810

bjohnson@rainbow
treecare.com

Tree Selection

Gary Johnson
U of MN Urban Forestry

Professor

612-625-3765

grjonson@umn.edu

Watering and Fertilization

Patrick Weicherding 
Anoka County Extension

Extension Educator

763-755-1280

weich002@umn.edu

  Pest Management:

Buckthorn: Removal and Management

Mary Maguire Lerman
Minneapolis Park & Recreation Board

Horticulturist

612-313-7726

mlerman@minneapolisparks.org

Peter Dzuik
MN Dept of Agriculture

 

651-296-3343

peter.dzuik@state.mn.us

Janet Larson

Consulting Arborist

952-941-6876

janetlars@pclink.com

  Diseases:

Dutch Elm Disease

Mark Stennes,
S&S Tree and Horticultural Specialists

Plant Pathologist

651-451-8907

Treespeak@aol.com

Linda Haugen
USFS

Plant Pathologist

651-649-5029

lhaugen@fs.fed.us

Leaf or Needle (Foliage) Diseases

Joe O'Brien
USFS

Plant Pathologist

651-649-5266

jobrien@fs.fed.us

Mike Albers
MnDNR

Forest Health

218-327-4115

mike.albers@dnr.
state.mn.us

Oak Wilt

Jenny Juzwik
USFS

Project Leader

651-659-5114

jjuzwik@fs.fed.us

Jana Albers
MnDNR Grand Rapids

Forest Health

218-327-4234

jana.albers@dnr.
state.mn.us

Sudden Oak Death Syndrome

Susan Burks
MnDNR Metro Forestry

Forest Health Specialist

651-772-7599

susan.burks@dnr.state.mn.us

  Insects:

Army Worms (see 
forest tent caterpillar
)

            

Asian Long-Horned Beetle

Dennis Haugen
USDA Forest Service

Entomologist

651-649-5248

dhaugen@fs.fed.us

Bronze Birch Borer and Wood Borers

Steve Katovich
US Forest Service

Entomologist

651-649-5264

skatovich@fs.fed.us

Emerald Ash Borer

Steve Katovich
US Forest Service

Entomologist

651-649-5264

skatovich@fs.fed.us

Exotic Tree Pests

Peter Dzuik
MN Dept of Agriculture

Exotic Species Program Coordinator

651-296-3343

peter.dzuik@state.mn.us

Forest Tent Caterpillar

Mike Albers
MnDNR – Grand Rapids

Forest Health Specialist

218-327-4115

mike.albers@dnr.state.mn.us

Gypsy Moth

Kimberly Thielen-Cremers
Mn Department of Agriclutre

Gypsy Moth Program Coordinator

651-296-6692

kimberly.thielen-cremers
@state.mn.us

Sue Burks
MnDNR

Forest Health Specialist

651-772-7599

susan.burks@dnr.state.mn.us

Japanese Beetle

Doree Maser
MN Dept. of Agriculture

Japanese Beetle Program Coordinator

651-296-8558

doree.maser@state.mn.us

  Other:

Insecticides and Pesticides

Vera Krischik
U of MN – Entomology

Entomologist

612-625-7044

krisc001@umn.edu

Bob Tiplady
Mn DNR, Brainerd

Plant Health Specialist

218-828-2616

  

Integrated Pest Management (IPM)

Linda Treeful,
Plant Disease Diagnostics

IPM Specialist

651-731-1378

treef001@umn.edu

  Urban and Community Forestry:

Arbor Day

Don Mueller
MnDNR, Forestry

Forestry Regional Specialist

651-772-6148

don.mueller@dnr.
state.mn.us

Grant Programs

Ken Holman
MnDNR, Forestry

Forestry Regional Specialist

651-259-5269

ken.holman@dnr.
state.mn.us

Hazard Tree Management

Jill Pokorny
USFS

Plant Pathologist

651-649-5247

jpokorny@fs.fed.us

 Jana Albers
MnDNR

Forest Regional Specialist

218-327-4234

jana.albers@dnr.
state.mn.us

Hiring An Arborist

Katie Himanga
Heartwood Forestry

Consulting Forester

651-380-9680

khimanga@earthlink.net
www.heartwoodforestry.com

Inventory Methods

Don Mueller
MnDNR Forestry

Forest Health Specialist

651-772-6148

don.mueller@dnr.
state.mn.us

Ordinances To Protect Or Preserve Trees

Katie Himanga
Heartwood Forestry

Consulting Forester

651-380-9680

khimanga@earthlink.net
www.heartwoodforestry.com

Peter Bedker
USFS

Plant Pathologist

651-649-5030

pbedker@fs.fed.us

Partnerships with Agencies and Nonprofits

       

Planting Trees:
Methods and Projects

       

Planting Trees:
Establishment

* Gary Johnson
U of MN - Urban Forestry

Professor

612-625-3765

grjonson@umn.edu

Volunteers

Paul Walvatne
MnDOT

Transportation Program Supervisor

651-284-3793

paul.walvatne@dot.
state.mn.us

  Natural Resource Management:

Energy Conservation

Peggy Booth
MnDNR

Forestry Regional Supervisor

651-772-7562

peggy.booth@dnr.
state.mn.us

Genetically Modified Trees

Bill Berguson
UMD Natural Resource Research Institute

Program Director

218-720-4296

bergu003@umn.edu

GIS Mapping

Dr. Tom Eiber
MnDNR

Forestry Information Service Supervisor

651-297-3417

tom.eiber@dnr.
state.mn.us

Planning, Design, Schematics

Ken Simons

Landscape Architect

763-717-9366

 

Urban Sprawl – Best  Management Practices

Jean Mouelle
MnDNR

Forestry Specialist

651-772-7925

jean.mouelle@dnr.
state.mn.us

Urban Wildlife Management

Joan Galli
MnDNR

NR Spec. Sr. Wildlife

651-297-2277

joan.galli@dnr.state.mn.us

Valuation of Trees

Ken Simons

Landscape Architect

763-717-9366

 

Bob Slater
MnDOT

Forester

507-529-6145

robert.slater@dot.state.mn.us

Kathy Widin

Consultant

651-436-8811

kdwidin@comcast.net

Wetlands and Storm Water Management

Tom Hovey
MnDNR

Hydrologist

651-772-7923

tom.hovey@dnr.state.mn.us

Wood Utilization

Jim Hermann
MPRB

City Forester

612-313-7729

jhermann@minneapolisparks.org

Steve Bratkovich

US Forest Service

 

Sbratkovich@fs.fed.us

 

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