Rose: Redhumped caterpillar
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: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
- 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
If you choose to use a pesticide, some examples of products that are legal in Washington are listed below. Some products are labeled for just INDOOR or just OUTDOOR use, or may allow both uses. Be sure to choose a product appropriate for your situation. Always read and follow all label directions.
Additional Image
Photo by: A.L. Antonelli
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Evidence of noncompliance may be reported through your local Extension office.