Rose: Roseslug
Photo by: A.L. Antonelli
Biology
Rose slugs are small yellow-green larvae (about 1/4″ long) that skeletonize the upper leaf surface.
Signs of feeding include dry brown blotches, where all of the leaf except the veins and the lowest layer of leaf tissue are removed.
Rose slugs are not true slugs but are actually the larvae of a sawfly.
They rarely occur in large numbers but can do considerable aesthetic damage.
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!
- Hand-pick and destroy individual rose slugs.
- Wash rose slugs off foliage with a strong stream of water.
Chemical Management
IMPORTANT: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
- Apply when first noticed.
- These products are toxic to bees.
- Sevin (carbaryl) is particularly dangerous to bees. Avoid using carbaryl if there is any possibility of pesticide drifting onto nearby blooming plants.
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.
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.