OneStop | Directories | Search U of M 

CUES: Center for Urban Ecology and Sustainability

Diagnosis Case: Oak

Shothole damage on oak may be caused by Spring cankerworm (Paleacrita vernata) and Fall cankerworm (Alsophila pometaria). Although shothole damage could be gypsy moth, it is a quarantined pest and any reports of Gypsy Moth should be reported to the MDA.

Older Gypsy moth larvae showing five pairs of raised blue spots and six pairs of raised brick-red spots.

Times to look for shothole damage: Gypsy moth shot hole damage is best detected in May. Shot holes are created by cankerworms in late April.

(Photo courtesy USDA Forest Service)


Back to Oak Diagnosis


(C) Regents of the University of Minnesota. All rights reserved.
The University of Minnesota is an equal opportunity educator and employer.

Contact U of M | Privacy
Last modified on March 06, 2013