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The Slow, Dangerous Death of Millions of Colorado’s Trees

In this article with The Denver Post, Kevin Marks, district manager of Davey's North Denver office, tells readers what they need to know about EAB with the recent discovery in Longmont.

Posted: July 13, 2016 

Emerald ash borer (EAB) is a small, glitter-green insect threatening millions of ash trees in Colorado, 15-25 percent of the state’s urban tree population. The insect quickly kills any untreated ash in its path, but prevention is easy and affordable if caught early.

Since September of 2013, the people and city of Boulder have been battling EAB. Despite a quarantine established by the Colorado Department of Agriculture, the insect has spread and is expected to eventually infest the entire state. On June 6, 2016, EAB was reported in Longmont, just 12 miles from Boulder. Acts such as transporting firewood cause more infestation and make the risks for outbreaks extremely high.

Landscapes across America and especially in Colorado are changing due to EAB. Research shows that homes within 15 miles of an EAB infestation should take preventive measures. Plan to consult a certified arborist and take a long term view on your landscape. Since detected in 2002, these Asian insects have destroyed more than 50 million ash trees in 27 states and caused more than $10 billion to be spent for the removal, treatment and replacement of millions of trees.

Ash trees are popular in Colorado for their fast-growing, large-canopy and strength to withstand fast-changing weather events. Longmont alone has approximately 43,000 ash trees.

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