Tree Borer Infestation
Can you advise treatment for borer infestation in my tree. Tree is about 50 feet tall. Do not know age. Do not know type (see photo of leaves and bark). First noticed couple months ago. Affects tree trunk as far up as I can see. Number of borers seems to increase. Tree in full sun. Soil type has not changed around tree. Good drainage. I sprayed with Lindane one time, several weeks ago. Do not notice difference.
From the photos that you sent it is possible the tree may be a hickory but we cannot say for sure. Trees are subject to many environmental and cultural stressors such as drought, poor drainage, too much moisture, temperature extremes, too much mulch, planting too deeply, soil compaction, etc.
You should be able to see the flare at the base of the trunk where it meets the root system. Remove the grass from around the tree trunk and look for this. Keeping a mulched area around the trunk keeps lawn mowers and string trimmers away from the trunk which causes more damage.
When stressed by the above conditions the tree will be more susceptible to insect and disease problems. We cannot say what type of borer you may be dealing with. There are many type of Borers and in general they disrupt the vascular system and cause dieback. Chemical control may not solve the problem.
At this point, we recommend that you contact several arborists for an onsite diagnosis regarding the health of your tree. They can let you know whether or not the tree may be a hazard and the best way to proceed.