Impatiens Stems Cut at Base: Cutworms

Cutworm larva

Newly planted impatiens found broken off at soil line, uneaten, stashed by stone wall.

Classic Cutworm Damage

• Nocturnal caterpillars (moth larvae).
• Hide in soil by day, feed at night.
• Chew stems at base—plants topple like felled trees.
• Often leave cut plant uneaten.

Organic Control

• Bt (Bacillus thuringiensis): Powder (Dipel, MVP). Dust foliage and soil surface. Reapply after rain.
• Collars: Toilet paper tubes or cups around stems at planting.
• Diatomaceous earth around plants.
• Hand-pick at night with flashlight.

Early spring is peak season. Protect new transplants immediately.