Emerald Ash Borer

The emerald ash borer (EAB) is an exotic insect pest originated from China and the Korean peninsula. EAB feeds on all species of ash (Fraxinus spp.), of which there are three species in Anne Arundel county: green, white, and pumpkin ash; all of them found at Jug Bay. Ash trees are commonly found along rivers, streams, and forested wetlands. EAB was first introduced to Maryland in 2002, and its presence has already been confirmed in Anne Arundel County, including Jug Bay.

If left untreated, EAB will ultimately infest and kill every ash tree in Jug Bay, the county, and Maryland. This will result in the loss of important tree cover not only in natural areas but in the urban setting. In addition to removal and chipping of infected trees, current science supports the use of insecticides for the treatment of low and no-infested trees as a conservation measure.

Considering the imminent threat of EAB to Jug Bay’s ash tree population, in 2014 the Sanctuary in collaboration with county forester Earl Reaves, staff from the Maryland DNR Forest Service, and volunteers completed a mapping of the main areas occupied by ash trees in the Glendening Preserve and the Sanctuary proper. This information will then be used to inform the development of a “Jug Bay ash treatment strategy” to be implemented in the spring of 2015.

The main objective of this effort is to at least extend the life (and value) of some of the most prominent ash trees (stands) present in Jug Bay, including specimens from the unique pumpkin ash species.