These technical publications are available to the public and provide valuable information on forest and tree health, forest stewardship, Illinois Big Tree Register, Illinois Forestry in Focus, invasive species, and silvics and forest ecology. 

In addition to these technical publications, Illinois Extension Forestry provides presentations and other recorded content through our YouTube Channel.

Illinois Timber Price Bulletins

Custom Sawmills & Woodworkers StoryMap

2010-2014, 2015-2019 





Forest & Tree Health

Laurel Wilt on Sassafras

Oak Skeletonizer Affecting Shingle Oak

Southeastern Forests and Climate Change: Illinois Supplement

Forest Stewardship

Professional Consulting Forester StoryMap

Agency or Staff Forester StoryMap

Illinois Forestry Best Management Practices

Plat of Survey and Tax Parcel Maps

Illinois Forestry Contractor’s List

Illinois Technical Forestry Assistance

Oak System Recovery: A Vision for Sustaining Oaks in Southern Illinois

Illinois Big Tree Register

Illinois Champion Trees StoryMap

Illinois Big Tree Nomination Form 

Illinois Big Tree Nomination Guide

Geolocating Big Trees with GPS 

Illinois Big Tree Volunteer Form

The Sine Method: A Better Tree Height Measurement Technique

Illinois Big Tree Inspector Training Guide

Illinois Forestry in Focus

Checklist of Illinois Native Trees

At the Crossroads of Forestry and Wildlife Management

Planning to Harvest Timber? Consider Hiring a Consultant 

To Treat or Not to Treat? Should you treat your ash trees for emerald ash borer

Invasive Species


Invasive Plant Species Regulated by the Illinois Exotic Weed Act 

Management of Invasive Plants and Pests of Illinois

Illinois Regulations Regarding Invasive Plant Species

Invasive Plant Phenology Report Series: 2016, 2017, 2018

Poison Hemlock

Spotted Lanternfly

Invasive Species Update: Jumping Worms

Invasive Species Update: Chaff Flower

Garlic Mustard: HomeownersLand managers.

Winter Identification of Bush Honeysuckle: FactsheetVideo

Stiltgrass: Field Guide to the Identification of Japanese StiltgrassJapanese Stiltgrass Hidden Reproduction InfographicWineberry Invasive Species Factsheet

Giant Hogweed Comparison and Identification Sheet

Oriental vs American Bittersweet: Winter identification

Invasive Plant Responses to Silvicultural Practices in the South

Silvics & Forest Ecology

Checklist of Illinois Native Trees

Distinguishing Persimmon and Black Gum Leaves and Twigs

Identification Characteristics of Hickory Species Native to Illinois

Maximum Tree Age and Longevity

Forestry and Wildlife

Managing Forests for Bats in Illinois 

Illinois Tree Farm Program

Tree Farm Program Orientation Manual

IDNR Division of Forest Resources

IDNR District Forester Offices

IDNR Division of Forest Resources