Emerald Ash Borer
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| Emerald ash borer |
_Emerald Ash Borer (Agrilus planipennis)_
Bethlehem Tree Service warns about the dangers of the Emerald Ash Borer, a half-inch long metallic green beetle from Asia, found in nearly every county in Pennsylvania. First identified in North America in 2002 and western Pennsylvania in 2007, it's crucial to act fast.
_Signs of Infestation_
Look out for:
- Upper crown dieback
- Epicormic branching
- Bark splits and flaking
- Tissue damage from woodpecker predation
- D-shaped adult beetle exit holes
- S-shaped larval feeding galleries
Bethlehem Tree Service can help identify these signs and recommend action.
_Susceptible Trees_
All native North American ash species and ash cultivars, including White fringetree, are at risk. Bethlehem Tree Service can assess your trees' vulnerability.
_Management and Control_
Bethlehem Tree Service recommends a comprehensive ash management plan, aligned with DCNR's Bureau of Forestry objectives:
- Manage ash as a component in the forest
- Protect endangered ash species
- Mitigate negative impacts
- Conserve economic value
- Manage seed orchards and collect seeds
- Conduct training and public outreach
_Control Options_
Bethlehem Tree Service offers:
- Tree removal
- Chemical control (systemic insecticides)
- Biological control (parasitoid species)
_Biological Control_
Long-term management depends on classical biological control and tree breeding programs. Bethlehem Tree Service utilizes four parasitoid species for biological control:
- Oobius agrili
- Tetrastichus plannipennsi
- Spathius agrili
- Spathius galinae
_Tips for Homeowners_
Bethlehem Tree Service advises:
- Use insecticides effectively to treat landscape ash trees
- Prevent infestation by selecting the right insecticide product and application method
- Only treat healthy ash trees of value
- Remove other ash trees before they become a hazard
Trust Bethlehem Tree Service to protect your trees from the Emerald Ash Borer!

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