Managing Cecropia Moth Caterpillars in Kansas

Cecropia moth (Hyalophora cecropia) caterpillars are large, striking, and rarely pests—but can defoliate small plantings. In a cemetery setting, tolerance is often best.

Control Options (If Needed)

• Bt (Bacillus thuringiensis): Organic, caterpillar-specific. Apply when larvae are small; repeat per label.
• Hand-pick: Relocate to nearby wild trees (cherry, maple, willow).
• Do nothing: One generation per year; native birds/parasitoids regulate populations.

Resources

• Contact River Valley Extension District (Washington County) for local advice.
• Cecropia moths are spectacular pollinators; consider them a sign of ecosystem health.

Unless damage is severe, enjoy the show—these "giant silkworm" caterpillars become North America's largest native moths.