Here are some websites that provide additional information.
Information and images of economically important beetles that feed on trees and shrubs.
Consolidation and dissemination of information and programs focused on invasive species, forest health, natural resources and agricultural management at the state, regional, national and international levels.
The National Plant Board is a non-profit organization of the plant pest regulatory agencies of each of the states and the Commonwealth of Puerto Rico. Member agencies must be members in good standing of the Regional Plant Board in which their state or commonwealth is located.
PPQ safeguards agriculture and natural resources from the risks associated with entry, establishment, or spread of plant pests and noxious weeds.
USFS manages national forests and grasslands, conducts forestry research, and provides technical and financial assistance to state and private forestry agencies.