How to Get Rid of Green Worms on Rosebushes

The most organic treatment is hand-picking the worms and dropping them in a bucket of soapy water. If that's not feasible, look for insecticidal soap or neem oil-based insecticide at your garden center—these are often considered organic. Note: Insecticidal soap must be sprayed directly on the worms to be effective.

For a stronger chemical solution, try an insecticide containing Sevin (carbaryl). Available at garden centers—follow package directions carefully. Misapplication reduces effectiveness.