What are Lilac/Ash Borers?
There are several species of lilac/ash borers that are guilty of wood-boring in the greater Colorado Springs landscape. These particular borers will feed on ash, birch, fir, oak, and pine, as well as various stone fruit trees. Their larvae are white bodied with a black head and are between 1-1.5 inches long at maturity. They pupate into moths. The adult moths will have long, narrow front wings and shorter, wider, back wings. In the adult stage, the moth closely resembles a yellowjacket or paper wasp.
What are signs of the Lilac/Ash Borers?
Stressed ash trees are of major concern when it comes to this particular insect. Many of these stresses include bark damage, over/under watering, improper plant depth, and the recent transplanting of a given tree. Unhealthy trees will have a tougher time fending off this borer naturally. You can identify an attack by inspecting the trunk of the tree for 1/4 inch round exit holes and visible sawdust at the base of the tree. Another way to identify an attack is to find a paper type, clear, pupal remnant the moth will leave behind as it exits the tree. If you’re not sure if these wood-boring pests are threatening your trees, then call the lawn and tree care professionals at Integrated Lawn and Tree Care. We can help you identify whether or not Ash Borer Beetles are at the root of your problem.
Certain trees on your property including parkway planted trees, recently transplanted trees, and trees receiving less than optimal watering will be at a higher risk of a Lilac/Ash Borer attack. A preventative spray of insecticide is recommended in order to control the larvae before they enter the trunk of the tree. These insecticides are applied directly to the trunk of your tree and will give season-long control against any borer type pest. Soil type applied systemic insecticides are not recommended for this particular insect.