Michigan State University Extension
Ornamental Plants plus Version 3.0 - 00001755
11/12/99
European Pine Sawfly
Pine sawflies are pests of pines. They are often confused
with moth larvae but the adult of these insects is more
like a fly.
The insects overwinter as eggs that hatch out during a
two week period in early May. The insects feed for 4 to 6
weeks. The insects pupate in litter beneath the tree or
in protected sites on the lower trunk. The adults emerge
in early September to late autumn. After mating the
females lay eggs in slits in pine needles.
The insects eat the old needles but leave the new shoot
alone. The insects feed in colonies and when disturbed
will bob up and down.
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This file was generated from data base ZZ on 01/19/00.
Data base ZZ was last revised on 11/12/99.
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