Emerald Ash Borer Treatments in Colorado 

Protect Your Ash Trees Before It’s Too Late: with These Emerald Ash Borer Treatments

For decades, ash trees have been one of Colorado’s most popular shade trees, lining neighborhoods, parks, commercial properties, and HOA communities. Unfortunately, these valuable trees are now under serious threat from the Emerald Ash Borer (EAB)—an invasive insect responsible for killing hundreds of millions of ash trees across North America. 

The good news is that healthy ash trees can often be saved with proactive Emerald Ash Borer treatment. 

At Vargas Property Services, we believe tree healthcare is an investment, not an expense. Protecting mature trees preserves your property’s beauty, reduces liability, and avoids the significant costs associated with tree removal and replacement. 

Why Emerald Ash Borer Is a Serious Threat 

Emerald Ash Borer larvae feed beneath the bark of ash trees, destroying the tissue responsible for transporting water and nutrients. Because the damage occurs inside the tree, infestations often go unnoticed until symptoms become severe. 

Warning signs may include: 

• Thinning or dying canopy  
• Branch dieback  
• Excessive sprouting along the trunk  
• Woodpecker activity  
• Distinctive D-shaped exit holes in the bark  

By the time these symptoms become obvious, the tree may already be experiencing significant internal damage. 

Injection Treatments: The Best Defense 

The most effective way to protect healthy ash trees is through systemic trunk injections. 

Rather than spraying chemicals into the environment, specialized products are injected directly into the tree’s vascular system. The tree then distributes the treatment throughout its canopy, protecting it from Emerald Ash Borer larvae as they feed. 

Benefits of trunk injections include: 

• Highly targeted treatment  
• Minimal impact on pollinators and beneficial insects  
• No overspray onto surrounding landscapes  
• Long-lasting protection  
• Proven effectiveness when applied before severe infestation  

Most healthy ash trees require treatment on a recurring schedule determined by the product used, tree size, and overall health. 

Tree Healthcare Is Preventive Care 

Much like routine maintenance on a building or vehicle, preventative tree care delivers the greatest value before major problems develop. 

Replacing a mature ash tree can cost thousands of dollars when removal, stump grinding, replacement planting, irrigation modifications, and years of lost shade are considered. In contrast, protecting an established tree often represents a fraction of that investment while preserving decades of growth and environmental benefits.