UMaine Spruce Budworm Lab L2 Map
How does this map work?
To predict SBW populations for the following year, tree branch samples are collected in the fall and submitted to the UMaine Spruce Budworm Lab. The Lab processes the branch samples and counts the overwintering stage of SBW, better known as an L2. L2 counts and models will be updated weekly as new samples are processed by the UMaine Spruce Budworm Lab.
Any questions on the models should be directed to Neil Thompson, Professor of Applied Forestry at UMFK, neil.thompson@maine.edu. Additional layers are available for viewing parcel boundaries, 2023 data (Maine & Canada), and previous models. Click here to view the mapping application in a separate window. To get the most up-to-date population estimates, make sure you are viewing the most current layer.
Maine Forest Service Survey Maps
A successful spruce budworm monitoring program requires a multi-pronged approach and relies on the use of survey methods such as pheromone trapping, light trapping, overwintering larval (L2) sampling, and aerial and ground survey. The Maine Forest Service leads pheromone and light trapping and aerial and ground survey efforts.
Older maps and annual summary reports (prior to 2024) can be found on the Maine Forest Service Spruce Budworm website.