How to Manage Pests

Pests in Gardens and Landscapes

Raspberry sawfly—Monophadnoides geniculatus

Identification

Larvae are up to 0.67 inch long with smooth, pale green bodies with dark brown stripes down their backs. They are often in groups on the undersides of leaves. Adults are small, thick-bodied wasps.

Life cycle

Adult sawflies emerge from the soil in April or May and insert eggs in leaf tissue. Larvae feed until June and then drop to the ground and pupate in the soil. There is only one generation per year.

Damage

Small holes appear in leaves and increase in size in May and June until only the veins remain, the leaves becoming skeletonized.

Solutions

Handpick and destroy infested leaves. The raspberry sawfly does not generally warrant further control unless plants are threatened with defoliation.

Raspberry sawfly adult
Raspberry sawfly adult

Raspberry sawfly adult
Raspberry sawfly larva


Statewide IPM Program, Agriculture and Natural Resources, University of California
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