The Emerald Ash Borer (EAB) has emerged as one of the most destructive pests affecting ash trees across North America. This small, metallic green beetle, native to Asia, has caused significant damage to ash tree populations since its accidental introduction into the United States in the early 2000s. Understanding the biology, impact, and management strategies for the Emerald Ash Borer is crucial for preserving our forests and urban landscapes.
Biology and Identification
The Emerald Ash Borer (Agrilus planipennis) is a beetle with a striking appearance. Adults are about 1/2 inch long and 1/8 inch wide, characterized by their vibrant metallic green bodies and coppery red underside. The larvae are creamy white, cylindrical, and can grow up to 1 inch in length.
The beetles lay eggs on the bark of ash trees, and the emerging larvae burrow into the wood, feeding on the inner bark and disrupting the tree's ability to transport water and nutrients. This feeding causes the characteristic symptoms of EAB infestation, including canopy thinning, dieback, and eventual tree death.
