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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. |
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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) | |
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