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Rose
Disease
Black mold
Black spot
Botrytis bud and twig blight
Brand canker
Bullheading (cold damage)
Common canker
Crown gall
Downy mildew
Powdery mildew
Rust
Viruses
Insect
Leafcutting bees
Leafrollers
Redhumped caterpillar
Root weevils
Rose aphids
Rose galls
Rose leafhopper
Rose midge
Roseslug
Spider mites
Thrips
Tobacco budworm
Western spotted cucumber beetle
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Caption: Rose slug and damage
Photo by: A.L. Antonelli
Rose : Roseslug
(revision date: 2/14/2019)
Use Integrated Pest Management (IPM) for successful plant problem management.
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
Non-Chemical Management
Hand-pick and destroy individual rose slugs.
Wash rose slugs off foliage with a strong stream of water.
Select non-chemical management options as your first choice!
Chemical Management
IMPORTANT:
Visit Home and Garden Fact Sheets for more information on using pesticides
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.
Listed below are examples of pesticides that are legal in Washington. Always read and follow all label directions.
Bayer Advanced Power Force Multi-Insect Killer R-T-S
Active ingredient: cyfluthrin | EPA reg no: 72155-39
Bonide Captain Jack's Deadbug Brew R-T-U [Organic]
Active ingredient: spinosad (spinosyn A+D) | EPA reg no: 4-472
Bonide Systemic Insect Control
Active ingredient: acephate | EPA reg no: 239-2461-4
GardenTech Sevin Conc Bug Killer
Active ingredient: carbaryl | EPA reg no: 264-334-71004
Safer Brand BioNEEM Multi-Purpose Insecticide & Repellent Conc [Organic]
Active ingredient: azadirachtin | EPA reg no: 70051-6-42697
This list may not include all products registered for this use.
Images
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Caption: Rose slug and damage
Photo by: A.L. Antonelli