Pick off and destroy infested leaves. Imidacloprid, which is registered for use against this pest in Connecticut, applied as a soil drench, may be effective. Consult the label for dosage rates and safety precautions. Violet sawfly, Ametastegia pallipes . At first, the lower surface of the leaves are skeletonized.
Larger larvae eat holes through leaves.
Injury is most noticeable in late spring. There may be several generations during the growing season. Insects may be handpicked when occurring in small numbers. Among the compounds registered for control of this pest in Connecticut are acephate, carbaryl, insecticidal soap, spinosad or malathion sprayed when the larvae are first observed to protect the foliage, or imidacloprid used as a soil-applied systemic. Consult the labels for dosage rates and safety precautions.