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Description Pear Slug Sawfly Larvae and Damage

Pear sawfly (Caliroa cerasi) larvae are often called “Pear slugs".

The slug-like larvae are up to ¼” long and are found feeding on the upper surface of leaves in mid-July. The adult breeding stage of the insect is 1/5” long and is non-damaging to host plants.

Plants Affected


Larvae feed on upper leaf surfaces, causing distinctive 'windowpane' damage. Heavy defoliation gives the tree a scorched appearance, and leaves many drop prematurely. Severe defoliation can adversely affect tree health.


Control by hand picking larvae or by washing them off with a forceful stream of water in mid/late July.


Last updated: 9/16/2013 8:48:59 AM