Protect Your Trees. Protect Your Landscape.

Insect & Pest Sprays in the Front Range, CO

Professional Tree Insect Control You Can Trust

Safe, Effective, and Locally Trusted

Colorado’s Front Range is home to some of the most destructive tree pests in the country – from emerald ash borer to bark beetles to aggressive defoliators. Left untreated, these insects can weaken or kill even mature, healthy trees.

Knothead Tree and Lawn Care provides targeted insect and pest control designed specifically for Castle Rock’s climate, elevation, and tree species. Our ISA-Certified Arborists diagnose issues accurately and apply treatments at the right time in the pest life cycle for maximum effectiveness. Whether you’re dealing with an active infestation or want to prevent one, we help keep your trees healthy, resilient, and protected year-round.

Emerald ash borer | Knothead Tree and Lawn Care

Common Tree Pests in the Castle Rock Area

Colorado’s Front Range climate makes it a hotspot for several destructive tree pests. Knowing the signs early can save your trees:

Emerald Ash Borer (EAB)

One of the most destructive invasive species in North America, EAB targets ash trees. Symptoms include canopy thinning, D-shaped exit holes in bark, and premature dieback. If caught early, systemic trunk injections can help save your ash tree.

Ips & Bark Beetles

These small beetles pack a big punch. They burrow under bark, cutting off nutrients and water flow, and often carry fungi that accelerate tree decline. Quick action is key! Once an infestation spreads, entire stands of pines or spruces can be at risk.

Tent Caterpillars & Defoliators

Caterpillars and moth larvae can strip a tree of its leaves in just weeks. While a single season of defoliation may not kill a tree, repeated damage weakens its defenses, leaving it vulnerable to other stresses. Treatment options include physical removal, insecticide sprays, and well-timed preventative care.

Our Tree Pest Control Process

1. Inspection & Diagnosis

Every service begins with a careful inspection from our certified arborists. We look for early warning signs, identify the pest accurately, and determine how far the damage has spread. Prevention and early detection are always less costly than emergency removal.

2. Customized Treatment Plan

No two infestations are alike. Depending on your trees, location, and the pest in question, we may recommend:

Horticultural oil to smother overwintering insects.
Insecticide sprays or foliar sprays for broad coverage.
Trunk injections for precise, long-lasting protection.

Each treatment is carefully timed to disrupt pest life cycles for maximum effectiveness.

3. Safe Application & Follow-Up

We apply treatments with professional-grade equipment and eco-conscious methods. Afterward, our team schedules follow-up visits to check progress, ensure your trees are responding well, and adjust your plan if needed.

Tree spray | Knothead Tree and Lawn Care

Testimonials

Real Stories from Your Neighbors

Company truck | Knothead Tree and Lawn Care

    
 
 
         
   Katie Cullum 
 
 
 
 Trustindex verifies that the original source of the review is Google. The Knothead crew have helped me with a few tree trimmings this spring as well as tree limb removal from snow damage, even referring me to a stump grinder for a few dead bushes. They were respectful and efficient and actually showed up when they said they would! I would recommend their services ~ 5 stars!
  
 
        
   Lura Wolfe 
 
 
 
 Trustindex verifies that the original source of the review is Google. Knothead Tree Care visited The Indian Park Schoolhouse and trimmed our huge old trees with care.  They understood the need to trim the dead branches while still caring for the tree.  They were fast, efficient, but most of all careful of the trees.
  
 
        
   Christina Young 
 
 
 
 Trustindex verifies that the original source of the review is Google. Grant and AJ are very pleasent to work with,  have been trusting, hard working, helpful and kind. I would trust them with any of my tree needs. You can't go wrong!!
  
 
        
   Dwight D 
 
 
 
 Trustindex verifies that the original source of the review is Google. Grant and Andy did a superb job on our tall pine, cleaning up broken limbs from heavy shows. Very professional and well equipped.
  
 
        
   Stephen Berry 
 
 
 
 Trustindex verifies that the original source of the review is Google. Andy and Darrin are the definitive example of stellar customer service. I would give 6 stars if I could!
  
 
        
   Anne Wattenberg 
 
 
 
 Trustindex verifies that the original source of the review is Google. Knothead, Brett’s team has been taking care of our trees for 15 years and has gone above and beyond to keep them heathy and looking beautiful!
  
 
        
   Larry 
 
 
 
 Trustindex verifies that the original source of the review is Google. Greg, Garrett, and Alex from Knothead did really great work removing a large 40+ year-old foxtail pine that had succumbed to a faulty watering system and extreme drought conditions. They were remarkably efficient and cleaned up everything when the job was done. We will definitely use their services again--highly recommend.
  
 
        
   Rich Colaiano 
 
 
 
 Trustindex verifies that the original source of the review is Google. I just had our trees sprayed for the second time, this company, and these people, Aaron and AJ, have saved my trees. We were told by another arborist that our trees were going to die, and there was nothing we could do about it. This company‘s arborist came out and told us what to do to save our trees, we did what he told us to do, and they did what they said they were going to do. And saved all our trees thanks again. Highly recommended. Also reasonably priced for the work they do.
  
 
        
   george majors 
 
 
 
 Trustindex verifies that the original source of the review is Google. Thank you Andy, Joseph, and Ken, for the removal of our Dead Pine tree and the trimming of another Pine tree, in our Champions Court Community here in Castle Rock Good Job Guys
  
 
        
   Gael Barker 
 
 
 
 Trustindex verifies that the original source of the review is Google. Knothead Tree and Lawncare is a must have in our CO climate.  We have used them for years.  Everyone is personable, helpful, true to schedules set.  Brett, the owner is a certified arborist with an enormous amount of knowledge.  He is always available for questions or to stop by and advise on a problem.  His integrity is beyond reproach and is sensitive to budget constraints.  I can't say enough about this great company and urge you to call for all your tree, bush, lawn care needs you will not be disappointed. Happy in Larkspur
  
 
  
 
  
 
   Google rating score: 5.0 of 5, based on 28 reviews

Why Timely Pest Control Matters

Locally Trusted Since 2008

(303) 885-3800(303) 885-3800

Ignoring insect issues often leads to long-term damage and expensive removal down the road. Here’s why fast action is worth it:

Prevents structural decline and loss of valuable trees.
Protects surrounding plants and preserves property value.
Supports Colorado’s landscapes and ecosystems by controlling invasive pests.
Saves money through early intervention instead of crisis response.

Think of pest control as insurance for your trees: small steps today prevent big losses tomorrow.

Frequently Asked Questions

Q: Is insect spray safe for my family and pets?

A: Yes. We use treatments with low-toxicity options and follow strict label guidelines. Our team will inform you of any safety precautions after application.

Q: How often should pest control be applied?

A: It depends on the pest. Some insects only require one treatment per season, while others benefit from quarterly monitoring and care.

Q: What does tree pest control cost?

A: Costs vary depending on tree size, the type of pest, and the treatment method. We provide clear, written estimates after inspecting your property.

Service Areas We Cover

Professional Tree Services in Your Neck of the Woods

Knothead Tree & Lawn Care proudly provides tree insect control services throughout Castle Rock and many surrounding Colorado communities:

If you don’t see your city on the list, don’t worry, reach out, and we’ll let you know if we can help.