Burlington Public Library

Emerald ash borer attacks and kills all true native North American ash trees, including green, white, black and blue ash, and their cultivars. This pest kills stressed and healthy trees and is so aggressive that ash trees may die within two years after they become infested. Provides information on what the Colorado State Forest Service is doing to contain the problem, what the citizen can do to protect ash trees, and provides other resources.

When the emerald ash borer arrived in Colorado, the importance of how to identify an ash tree in the urban landscape became very important.

This guide is intended to assist field personnel in identifying life stages of, and damage caused by, emerald ash borer (EAB) (Agrilus planipennis Fairmaire). This difficult-to-detect insect causes symptoms in ash trees similar to those caused by many other abiotic and biotic causes. When diagnosing ash tree problems, it is important to step back and look at the whole picture as many diagnostic clues can be obtained by analyzing site conditions. Symptoms...