What's eating my swamp white oak?

Swamp White Oak faces the same suite of oak caterpillars and borers as other white oaks but is somewhat tolerant thanks to its preference for moist sites, which reduces drought stress. Spongy moth, oak borers, and gall wasps are the primary insect threats. Deer browse seedlings in suburban plantings.

Heavy defoliation in late spring; repeated defoliation over two to three years kills otherwise healthy trees; egg masses on bark Bt spray targeting young caterpillars; scrape and destroy egg masses in autumn/winter; sticky trunk bands to trap climbing caterpillars

Dieback beginning at crown; winding galleries under bark; stress from flooding or drought triggers attack Maintain optimal soil moisture (not waterlogged); prune out dead limbs promptly; preventive imidacloprid soil drench for landscape specimens

Stippled, bleached foliage with black fecal spots on leaf undersides; premature leaf drop in heavy infestations; trees look scorched by midsummer Insecticidal soap or neem oil spray targeting leaf undersides; systemic imidacloprid for chronic infestations on high-value trees

Antler rubbing strips bark from young trunks; repeated browsing of seedlings and saplings prevents regeneration Wire-mesh tree tubes or hardware cloth guards on young trees; repellent sprays; deer-exclusion fencing in nursery or woodlot settings