emerald ash borer adult on leaf-close upSince 2002, an imported pest, Emerald Ash Borer, has been killing tens of millions of large Ash trees across 15 states. The bright green adults are very noticeable, but their larval stage of life is the danger to Ash trees. As the adult lays eggs and these larvae bore into and throughout the vascular tissue inside the bark, it disrupts normal tree functions that transports water and nutrients to the crown of the tree. Approximately 1 year after the initial infestation, Ash trees will start to die-back, losing a portion of live growth in the crown. As this continues year after year, the tree will quickly decline, completely dying in 3-4 years.

ash tree leafAmerican Ash trees are beautiful shade trees. They can often be found in most of the U.S. in older residential areas and wooded lots. Identifying an Ash tree on your property is fairly easy if you know what to look for because it has very distinctive characteristics. It’s leaves are compound, meaning 7-9 leaflets are arranged in a single leaf. These leaves are also distinctive in how they grow on a branch. Whereas most trees will have their branches arranged alternately on a branch, and Ash tree will grow leaves opposite from one another. For more detailed information on Ash tree identification, click here.

emerald ash borer exit hole and galleryIf you have a high-value Ash tree on your property, maintaining its health and performing Emerald Ash Borer Control applications can help to prolong its life. Emerald Ash Borer has been found in several counties surrounding our location in Lancaster, PA and will continue to spread, given its history. The sooner you choose to engage in treating your Ash trees for prevention, the better their chances against Emerald Ash Borer. Although it doesn’t offer a full-proof guarantee, performing treatments to healthy Ash trees has been proven to be an effective measure for Emerald Ash Borer management and will significantly extend the life of healthy Ash trees.

tree injection iv systemSpring is the ideal time to perform both soil and trunk injections for Ash trees. However, if applications cannot be made at this time, fall is also recommended. Soil-applied insecticide is injected within 6″-12″ of the trunk of the trees measuring 10″ DBH (diameter at breast height) or less and is best when done annually. Keeping the soil moist for 7-10 days will assist in the material making its way into the tree to be circulated throughout the vascular system. This material will remain in the tree for remainder of the year until it needs to be reapplied the next season. In instances, where trees are larger than 10″ DBH, our Certified Arborists inject materials directly into the trunk of Ash trees. This treatment should be completed every other year.


When applied properly, research has shown that performing regular Emerald Ash Borer Control treatments for trees has not only helped healthy Ash trees remain so, but has also been shown to provide recovery to trees with up to 30% die-back after a few years of treatment. Tree services can perform these applications for your tree and also monitor for results. A Certified Arborist can evaluate the tree at the time of this application or while performing other Tree & Shrub Care applications throughout the season on your property. Fertilizing trees each year, periodically get tree pruning performed as recommended, and watered in times of drought is also important for Ash tree health. If die-back of your Ash trees worsens, it may make sense to remove trees before they become hazardous.

As of spring of 2015, presence of the Emerald Ash Borer has been confirmed in our local area. For the latest information about the Emerald Ash Borer, visit www.emeraldashborer.info. If you would like to discuss treatment options for your Ash trees, we would be happy to evaluate these trees and provide you with a free estimate for this service.

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I'm Interested in the Following Services for my Trees for my property in Lancaster, York, Lebanon, or Dauphin County, PA:

Insect Control (Scale, Bagworms, Beetles, etc.)Mite ControlDisease/Fungi ControlSoil Testing for Trees/ShrubsWinter Protection

Plant FertilizationTree Pruning/TrimmingTree RemovalStump GrindingCabling/Bracing