What's eating my emory oak?

Emory Oak, a Southwestern US native with sweet, edible acorns, faces twig girdlers, oak borers, and various leaf-feeding caterpillars. Coati, javelinas, deer, turkeys, and acorn woodpeckers compete heavily for the acorn crop. Drought amplifies bark beetle attacks. A tough, fire-adapted species with generally good pest resistance.

Circular girdle cuts around small branch tips; tips die and fall, often with eggs inside; scattered dieback of shoot ends throughout the canopy Collect and destroy fallen girdled twigs before adults emerge; no chemical treatment practical or necessary on established trees

D-shaped exit holes; serpentine galleries under bark of stressed limbs; crown dieback following drought or fire damage Maintain tree vigor; remove dead and dying limbs promptly; preventive systemic insecticide on high-value landscape specimens during drought

Larvae develop inside acorns; infested acorns have round exit holes at the base; can destroy a large proportion of the harvestable seed crop Harvest acorns promptly as they fall; submerge in water to float infested ones; no spray control practical on large trees

Systematic acorn caching and extraction; woodpeckers drill storage holes in trunks; coati and javelina consume fallen acorns; can remove most of the ground-level crop Harvest acorns soon after drop; no practical deterrence against wildlife on established trees — accept crop sharing as normal