The Idaho Department of Lands Forest Health program provides technical assistance and training to private landowners and forest managers on managing for healthy forests.
Our focus is on prevention and suppression of damaging insects and diseases before and during outbreaks. We promote restoration of tree species most suited to the environment in order to grow sustainable, productive and healthy forests.
Table of Contents
Fact Sheets
Identification and Management information on common forest health issues in Idaho.
Forest Health Highlights
Additional Resources
Pest Monitoring
The IDL Forest Health staff cooperate with other state and federal agencies to complete several annual pest detection and monitoring surveys throughout the state.
Douglas-Fir Tussock Moth
2023 Douglas-fir Tussock Moth Report
2022 Douglas-fir Tussock Moth Report
Douglas-fir Tussock Moth Fact Sheet 2021
Douglas-fir Tussock Moth Fact Sheet 2020
2021 Douglas-fir Tussock Moth Report
2020 Douglas-Fir Tussock Moth Report
2019 Douglas-Fir Tussock Moth Report
2018 North Idaho Douglas-fir tussock moth monitoring report
Douglas-fir tussock moth management guide
Douglas-fir tussock moth leaflet
Forest Insect & Disease leaflet
Spongy Moth (Formerly Gypsy Moth)
Aerial Surveys
Aerial detection surveys locate, identify, and map many forest health issues from the air. Each year, the IDL forest health team assists with flying over most forest lands in Idaho to record important trends. It is important to note that these surveys are intended to capture general patterns across the landscape, so point and polygon locations may not be exact.
2022 Idaho Aerial Detection Survey Map
2021 Idaho Aerial Detection Survey Map
2019 Idaho aerial detection survey map
To find and contact your closest Idaho Department of Lands office see our Supervisory Area map.