There are a number of sawflies on ornamental plants. Sawfly adults are thickwasted wasp-like insects and their larvae may resemble caterpillars or sometimes small slug-like creatures. They are often gregarious, feeding in groups, which can lead to a fair amount of defoliation. Included at this website are webpages on the following sawflies.
Original version: <10 August 2004)
Last update <21 February 2017>
Author: R.L. Rosetta, Extension Nursery Integrated Pest Management, Department of Horticulture, Oregon State University/NWREC.