Squash Bugs on Zucchini
Whole plant problem · common pattern reported by gardeners · verify locally
What you'll see
- Brown-gray bugs on leaves
- Egg clusters on leaf undersides
- Leaves wilt and die back
Most common causes
- Squash bugs feed and inject toxin
- Overwinter in garden debris
- Eggs hatch in waves
How to fix it
- Hand-pick bugs and eggs (scrape egg clusters)
- Trap boards overnight and destroy bugs
- Diatomaceous earth around stems
Prevention: Clean up debris in fall Rotate squash family crops Inspect leaf undersides weekly
More Zucchini problems
Grow Zucchini with confidence
Open the Zucchini 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.