White pine weevils may be causing those changes.
Are White Pine Weevils Hurting Your Trees?
Here’s the basic info to help you identify if white pine weevils are hurting your trees.
• Susceptible Trees: As their name suggests, they do prefer Eastern white pine trees. Often, they also attack blue, Norway and Serbian spruces. White pine weevils also can harm red, pitch, jack, Scot and Austrian pines. On occasion, they’re found on Douglas firs. If you have an evergreen, there’s a chance it could attract white pine weevils.
• First Sign: In late March or early spring, you’ll see a shiny, sticky droplet directly below your