Emerald Ash Borer and Treatment
Emerald Ash Borers Are Killing Ash Trees across the Philadelphia Region
Emerald Ash Borers are spreading rapidly. This 100% fatal pest is forcing homeowners to choose between treatment or tree removal. If you have Ash trees you love, you need to take action now.
Unfortunately, anyone with an Ash tree faces a difficult decision. Protect the Ash tree from Emerald Ash Borer with treatment or let it die and remove it. Without treatment, Ash Trees with Emerald Ash Borer die within 1-3 years. By the time you see visible decline, Emerald Ash Borer has already done significant internal damage to the tree. That’s why, it’s critical to treat now before damage is beyond repair. Check out our Emerald Ash Borer Fact Sheet for more information.
Here's How to Protect Your Ash Trees from Emerald Ash Borer:
- Early detection: Have your Giroud ISA Certified Arborist evaluate your property for Ash trees and recommend the best action.
- Treat high value Ash trees with a systemic trunk injection every two years. In performance tests, Michigan State researchers found that systemic trunk injections of TREE-age® with Emamectin Benzoate (Em Ben) applied every two years, achieved the best results.
Pictured: Healthy Ash trees protected with Tree-age® Trunk Injections growing right next to untreated Ash trees killed by Emerald Ash Borer. (Photo Credit: Daniel Herms, The Ohio State University)
- Other Emerald Ash Borer Treatment Options: The chart below shows the number of Emerald Ash Borer found two years after different treatment options were performed.
While systemic trunk injection is without a doubt the best treatment to combat Emerald Ash Borers, there are other options:
- Soil Injection/Soil Drench with Imidacloprid: EAB control has been inconsistent. Experience and research indicate that this treatment is most effective on smaller trees. The treatment must be applied annually in mid-late Spring or mid-Fall.
- Basal Trunk Sprays with Dinotefuran: Control was variable in research trials. The treatment reduced EAB larval density by approximately 30 percent to 60 percent compared to heavily infested untreated trees. The treatment is effective for one year.
- Topical Cover Sprays: Provides good control, especially when the insecticides were applied in late May and again in early July when the adult Borer are feeding on the leaves.
Warning: Dead Ash Trees Are Not Safe!
Emerald Ash Borers Are Fast Killers:
Ash trees infested with Emerald Ash Borers die within 1-3 years. If more than ½ of the tree's crown is dead, the Ash cannot be saved. Unfortunately, a dead Ash tree quickly becomes a safety hazard.
Check out our Dangers of Dead Ash Tree Fact Sheet for more information. Tree removal will be necessary, especially if the dead Ash is located near your home, driveway or play area. Pictured: Emerald Ash Borer killed this untreated Ash Tree in Blue Bell, PA
Why Are Dead Ash Trees Unsafe?
Two realities make Ash Trees killed by Emerald Ash Borers a safety hazard:
- Moisture Loss: Emerald Ash Borers cut off the flow of water and nutrients through the tree. Additionally, the fatal pest creates thousands of exit wounds. Both conspire to dry out the tree and make it brittle.
- Weak Structure: The same straight, tight grain that makes Ash great for baseball bats and splitting firewood is also why its limbs and leaders easily split apart. The result is a dry, brittle tree that is at high risk for breaking apart.
Removal Must Be Done ASAP:
A dead Ash tree is not a simple tree removal. The brittle tree is so dry that it can break apart in unexpected ways and cause significant damage. The first step is to have the tree evaluated.
Your Giroud ISA Certified Arborist will evaluate the tree’s condition. He will
determine if a tree climber can safely work in the tree or if a crane and/or bucket truck is required. The longer the dead tree is left in the ground, the drier and more dangerous it becomes; making tree removal even more complicated and expensive.
Don’t wait. Here are 4 Steps to protect healthy trees from Emerald Ash Borer and prevent damage from dead Ash trees:
- Inspection: Have your Giroud Arborist evaluate the tree and recommend the best action.
- Tree Removal: If the Ash tree is dead or has become unsafe, prompt removal is required.
- Treatment: If the Ash tree is still healthy enough to absorb treatment, a systemic trunk injection of Tree-age® every two years protects Ash from Emerald Ash Borers.
- Regular Pruning: In combination with treatment, remove deadwood and prune to promote healthy growth.
Local Communities in Emerald Ash Borer Danger Zone
Bucks County, PA
Montgomery County, PA
- CHESTNUT HILL
- EAST FALLS
- FOX CHASE
- MOUNT AIRY
- NORTHEAST PHILADELPHIA
- OAK LANE
- FOREST GROVE
- LINE LEXINGTON
- MILFORD SQUARE
- NEW HOPE
- PENNS PARK
- POINT PLEASANT
- WASHINGTON CROSSING
- BLUE BELL
- BRYN ATHYN
- BRYN MAWR
- ELKINS PARK
- FAIRVIEW VILLAGE
- FORT WASHINGTON
- GWYNEDD VALLEY
- HUNTINGDON VALLEY
- KING OF PRUSSIA
- LAFAYETTE HILL
- NORTH WALES
- PLYMOUTH MEETING
- SPRING HOUSE
- VALLEY FORGE
- WEST POINT
- WILLOW GROVE