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Emerald Ash Borer

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In the US, Emerald ash borer (EAB) was first discovered in 2002 in Michigan. Since then, tens of millions of ash trees have been killed and these invasive insects have spread across the country to the point where their presence was first confirmed in New Jersey in Somerset County in 2014. EAB was first detected in Bergen County in Hillsdale Borough in 2015 and continues to spread.

Preventive treatment of ash trees for EAB is not recommended until infestation is detected within a 10 to 15 mile radius. However, over time the infestation is likely to spread and the Alpine Environmental Commission urges residents to learn the telltale signs early-on so that they are ready to take action to protect any valued ash trees at the most appropriate time.

How close to Alpine is EAB?

What does an ash tree look like?

How to identify the presence of EAB?

What can be done? Treatments include application of insecticides by trunk injection, soil drenching, or spraying at the appropriate time of the season. If the canopy of a tree is more than 50% effected, the tree should be removed and replaced as treatment is unlikely to save it. Consult with a tree care specialist regarding these options.

For more information and photos visit these sites:


Center for Invasive Species and Ecosystem Health
NJ Dept of Environmental Protection

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