Rose: Redhumped caterpillar
categories: Flowers Ornamentals Rose Rose Insects
last review date: 2025-07-28 11:20
Photo by: A.L. Antonelli
Biology
The redhumped caterpillar is the larvae of a 1″ gray-brown moth.
The mature larvae are yellow with a red head and hump, and have orange, black, and white lengthwise stripes. The body of the caterpillar also has dark “spikes” on it.
Young redhumped caterpillars are found in clustered colonies which disperse as caterpillars mature.
They eat entire leaves (except the major veins).
Management Options
See "Using Integrated Pest Management (IPM) in the Landscape" for successful problem management techniques.
Non-chemical Management
Select non-chemical management options as your first choice!
- Cut out and destroy colonies before they disperse.
- Hand-pick and destroy individual caterpillars.
Chemical Management
IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides.
- Apply when caterpillars are observed.
- Bacillus thuringiensis (Bt) will control leafrollers only if they are actively feeding.
- Use a spreader-sticker with liquid Bt formulations.
Approved Pesticides
Examples of pesticides that are legal for home use in Washington State are listed below.
The list may not include all products registered for this use.
Additional Image
Photo by: A.L. Antonelli
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.