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U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Assessment & Applied Sciences

Forest Health News

Explore articles and information on current forest insect and disease conditions across the United States.

Mapping & Reporting

Forest Health Protection (FHP) Mapping & Reporting conducts surveys to detect and appraise insect infestations, disease conditions and man-made stresses affecting trees. FHP Mapping & Reporting establishes a monitoring system throughout the forests of the United States to determine detrimental changes or improvements that occur over time, and report annually concerning such surveys and monitoring.

Learn more about mapping & reporting

Mapping and Reporting Website Image

Insect and Disease Survey Map

Aviation Safety & Aerial Survey

Aviation Safety & Aerial Survey include insect and disease surveys, aerial photography and aerial application to assist federal and state partners and the public in meeting forest health objectives. The primary function of FHP aviation is to implement safe and efficient operations considering state of the art tools, technology, and philosophy embracing the principles of sound risk management applied throughout the system.

Learn more about aviation safety & aerial survey

Aviation Safety Photo


The Forest Health Assessment & Applied Sciences Team (FHAAST) produces publications, reports, and posters that address forest health-related disturbances. Topics include forest insects and diseases, native and invasive species, biological control, biopesticides, aerial survey, forest disturbance detection and risk assessment.

Learn more about publications

Classical Biological Control of Arthropods Publication Cover

Forest Vegetation Simulator Models

The Forest Vegetation Simulator (FVS) is a family of models used for predicting forest stand dynamics (tree growth, mortality, regeneration, management, disturbance, etc.) throughout the United States. The Forest Health Assessment and Applied Sciences Team supports a variety of insect and pathogen models that allow FVS users to incorporate forest pest disturbances into their FVS projections.

Learn more about forest vegetation simulator models

Mistletoe Model Example Image

Image represents a stand of Douglas-fir in the Fremont National Forest as simulated with the South Central Oregon Northeastern California variant of the Forest Vegetation Simulator (FVS) and the Dwarf Mistletoe Model. View animation (Opens in new window/tab) Opens in new window/tab