Elm Tree Losing Leaves with Larvae: Sawfly or Other Insect?

Elm in June losing leaves heavily despite good watering. Larvae inside leaves, red wasp-like insects on driveway. Owner suspects sawflies.

Critical First Step: Accurate Identification

Insect ID determines treatment urgency and method. Collect larvae and affected leaves; take to county Agricultural Extension office or reputable nursery for identification. Extension office typically in county courthouse.

Why ID Matters

Sawflies, caterpillars, beetles—each requires different control. Some cause cosmetic damage only; others threaten tree health. Misidentification wastes time and money. Get professional ID before treating.