Corn Borers: Holes in Stalks
Whole plant problem · common pattern reported by gardeners · verify locally
What you'll see
- Holes in stalks
- Frass at holes
- Broken stalks
- Ears chewed
Most common causes
- European corn borer larvae
- Overwinter in stalks
How to fix it
- Break and remove infested stalks
- BT spray during ear formation
Prevention: Destroy stalks in fall BT for borers Attract parasitic wasps
More Sweet Corn problems
Grow Sweet Corn with confidence
Open the Sweet Corn growing guide → · Planting calendar · Pest & problem diagnoser
ZoneFig content reflects widely published extension-service and gardening guidance. Symptoms and causes are common patterns, not a diagnosis for any individual plant — verify locally and treat conservatively.