Picture of the week

May 1, 2023

Pine Sawfly

Cliff Sadof, Extension Entomologist, Purdue University


pine sawfly damage

Now would be a good time to inspect mugo pines for what appears to be stray straw near the shoot tip. Close examination of the shoot could reveal the black heads of European pine sawflies.  These grow to an inch in length and will defoliate mugo and other pines.  Fortunately these sawflies are easily killed by an application of spinosad (Fertilome borer and bagworm killer), or 2% horticultural oil.


Click image to enlarge



Submit Samples                    POTW Archive


Keep up with current landscape issues by subscribing to the Purdue Landscape Report and learn to diagnose common landscape problems using Purdue Plant Doctor.


PPDL branding