Does emerald ash borer spread to other trees?
Yes. emerald ash borer moves to other trees, which is why one infected tree is a decision about the whole yard rather than about that tree. Treatable while the canopy is still mostly intact. Once roughly a third of it is gone, treatment stops being worth the money and the tree becomes a removal — and a dead ash goes brittle unusually fast, which makes it both more dangerous and more expensive the longer it stands.
What to check
Thinning from the top down, D-shaped exit holes about an eighth of an inch across, sprouts low on the trunk, and pale flecking where woodpeckers have stripped bark to get at larvae.
Indiana specifics
It has already moved through Indiana and killed the overwhelming majority of untreated ash. An untreated ash here is on a clock, not at risk.
Related
- How do I know if my tree has emerald ash borer?→
- Can a tree with emerald ash borer be saved?→
- Is emerald ash borer a problem in Indiana?→
- What does treatment for emerald ash borer cost?→
- What trees does emerald ash borer attack?→
- When should I treat for emerald ash borer?→
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