Pine & Sawflies

If you have pine trees in your yard, stay on the lookout for the pine sawfly. The larvae of this non-native insect feeds on living (green) pine needles from the previous year’s growth. New needles will grow each year at the branch tips; however, the older needles that were eaten will not grow back. Continued feeding can slow tree growth and cause the tree to appear thin if the number of feeding larvae is high, but tree loss from sawflies is uncommon. Get more information and learn management recommendations from the Unviversity of MN Extenstion Service.