What's eating my carolina hemlock?

Carolina Hemlock shares its gravest threat with Eastern Hemlock — hemlock woolly adelgid, which is now present across most of its native Blue Ridge range. Its limited natural range makes population-level losses especially concerning. Elongate hemlock scale and spider mites also affect this species. Prompt systemic insecticide treatment saves individual trees.

Woolly white egg masses at needle bases; needles discolor and drop; progressive dieback from lower branches upward; untreated trees die within 4–10 years Systemic imidacloprid or dinotefuran soil drench or injection; horticultural oil for small accessible trees; repeat every 4–7 years depending on product; consult extension services

Pale yellow spots on needles where armored scales feed; premature needle shed; progressive weakening of crowns especially in combination with adelgid Horticultural oil applied when crawlers are active in spring and early summer; systemic insecticide treatments timed with adelgid control for combined efficacy

Stippled bronzing of foliage; fine webbing on needle undersides; needle browning and drop; worst in hot dry conditions or on drought-stressed trees Increase irrigation to reduce drought stress; apply neem oil or horticultural oil; miticides as last resort; avoid over-application of nitrogen which boosts mite populations