Squash Vine Borer on Pumpkins
Whole plant problem · common pattern reported by gardeners · verify locally
What you'll see
- Sudden vine wilt
- Sawdust-like frass at stem base
- Holes in stem
Most common causes
- Squash vine borer larvae tunnel in stems
- Adult moths lay eggs at stem base
- June-July in most zones
How to fix it
- Slit stem lengthwise, remove larva, bury stem
- Injection of BT into stem
- Hill soil over wounded area
Prevention: Row covers until flowering Stem wrap Rotate cucurbits
More Pumpkin problems
Grow Pumpkin with confidence
Open the Pumpkin 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.