sawfly

/ˈsɔˌflaɪ/
noun
  1. An insect that looks like a wasp but does not sting, and whose larvae often damage plants.
    • The sawfly laid its eggs on the rose bush leaves.
    • A sawfly is not a true fly, but a type of hymenoptera.
    • Gardeners often find sawfly larvae eating their plants in the spring.