Regular tree inspections and maintenance help prevent diseases and insect infestations.
Our team can also apply preventive treatments before your ash trees show signs of infestation.
Infested mature ash trees should be treated every two years with TreeAzin insecticide to preserve them. TreeAzin injections must be administered by our arborists between June 15 and August 31.
Once signs of decline are visible, the infestation is already critical beneath the bark. In such cases, tree removal is strongly recommended to prevent the larvae from reproducing the following year.
If you delay action, removing a dead tree can be significantly more expensive. For smaller ash trees, it is often best to remove and replace them with another tree species.