Recovering a Spruce Tree from Bagworm Damage

Immediate Actions

Remove all bagworm cases now and dispose in trash—each contains 50–100 eggs that hatch next spring.

Spring Treatment

Cut out branches that fail to produce new needles. Spray with Bacillus thuringiensis (BT) when larvae become active (consult local garden center for timing).

Monitor for regrowth; spruce may not regenerate on heavily defoliated branches.