Emerald Ash Borer

Emerald Ash Borers primarily inhabit ash trees (Fraxinus species) in forests, urban landscapes, and nurseries. Their habitat is directly tied to the presence of ash trees.

The larvae of the Emerald Ash Borer feed on the phloem (inner bark) of ash trees, which transports sugars produced by photosynthesis. Adult beetles feed on ash leaves, but this feeding causes minimal damage.

Emerald ash borer adults emerge from D-shaped exit holes in ash trees from late May to July. Females lay eggs in bark crevices. Larvae tunnel under the bark, creating S-shaped galleries that disrupt the tree's vascular system. They typically complete one generation per year. Adults are strong fliers and can disperse to new trees.

Risk: The Emerald Ash Borer is an invasive species in North America and has caused the death of tens of millions of ash trees, leading to significant ecological and economic damage. It poses a severe threat to ash tree populations and associated ecosystems. Benefit: There are no known significant benefits associated with this insect.