When should I treat for needlecast?
Two fungicide applications in spring, repeated for two to three consecutive years. Miss a year and it resets.
Why timing decides it
Rhizosphaera needlecast is near-universal on mature blue spruce here. Fungicide can hold the line on a tree that still has most of its canopy; a spruce that's bare halfway up is not coming back, because spruce doesn't refoliate old wood.
Indiana specifics
Effectively endemic on Indiana blue spruce. It is the single most common reason a blue spruce gets removed here.
Related
- How do I know if my tree has needlecast?→
- Can a tree with needlecast be saved?→
- Is needlecast a problem in Indiana?→
- What does treatment for needlecast cost?→
- Does needlecast 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?→