When should I treat for oak wilt?
Never prune an oak here between April and July — that's when the beetles carrying it are active and a fresh cut is an open invitation. Dormant-season pruning only.
Why timing decides it
A red oak showing symptoms is usually lost within a season. The urgent job is protecting the oaks around it, because it moves underground through grafted roots.
Indiana specifics
Present in Indiana and the reason for the pruning rule below. It's the single best argument against 'we'll just tidy the oak up in June'.
Related
- How do I know if my tree has oak wilt?→
- Can a tree with oak wilt be saved?→
- Is oak wilt a problem in Indiana?→
- What does treatment for oak wilt cost?→
- Does oak wilt spread to other trees?→
- 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?→