WSU Extension

Hortsense

Strawberry
 
Disease
Common leaf spot 
Gray mold 
Red stele 
Viruses 
Insect
Aphids 
Brown marmorated stink bug 
Cutworms and armyworms 
Leafrollers 
Mites 
Root weevils 
Slugs 
Spittlebugs 
Spotted wing Drosophila (SWD) 



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Caption: European leafroller
Photo by: S.M. Fitzpatrick and J.T. Troubridge
  
Strawberry : Leafrollers
(revision date: 6/8/2015)


Biology
Several species of leafrollers can occur on strawberry. The caterpillars are typically light to dark green with light or dark heads, and are about 3/4" long at maturity. Typical symptoms of leafroller feeding include damaged buds and leaves that are rolled and tied with webbing. Some species may also cause damage to fruit by tunneling into berries. The larvae typically produce large amounts of webbing on the plants. Leafroller caterpillars are often active when disturbed, wiggling vigorously or dropping to the ground on a thread. The larvae of many species overwinter in webbed leaves on the plants. The adult moths are 1/2" to 3/4" long and are brown or mottled tan and rusty brown. Some species have darker bands across the wings. Plants easily tolerate some damage from leafrollers, which are seldom serious pests on strawberry.
Management Options


Non-Chemical Management
  • Pick out and destroy rolled leaves and caterpillars, when practical.
  • Pinch rolled leaves to kill caterpillars.
  • Clean up leaf debris on and under plants.
  • Encourage natural enemies of caterpillars including birds, parasitic wasps and flies, and predaceous beetles. Avoid use of broad-spectrum insecticides which kill beneficial insects.
Select non-chemical management options as your first choice!

Chemical Management

Apply when there are more than two larvae per plant. Apply Bt only when caterpillars are feeding. Use a spreader-sticker with liquid Bt formulations.

Listed below are examples of pesticides that are legal in Washington. Always read and follow all label directions.
  • Bonide Captain Jack's Deadbug Brew R-T-U [Organic]
    Active ingredient: spinosad (spinosyn A+D)  |  EPA reg no: 4-472
  • Bonide Thuricide BT Conc
    Active ingredient: Bacillus thuringiensis subsp. kurstaki  |  EPA reg no: 4-226
  • Safer Brand Garden Dust RTU [Organic]
    Active ingredient: Bacillus thuringiensis subsp. kurstaki  |  EPA reg no: 36488-25-42697
  • This list may not include all products registered for this use.
Images

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Caption: European leafroller
Photo by: S.M. Fitzpatrick and J.T. Troubridge
Caption: Omnivorous leaftier on strawberry
Photo by: Unknown
Caption: Obliquebanded leafroller adult
Photo by: J.F. Brunner