Leading Innovator in Tree Insect Control

Ross Tree Company prides itself on being a leading innovator in tree insect control. We were the first tree company in Denver to offer tree injections, a practicable alternative to spraying trees. Trunk injections ensure that only the tree gets the product, not the surrounding environment. Please see our insect calendar to find out more information about local harmful tree insects and diseases.

Sometimes spraying is warranted because of an insect infestation that needs immediate attention. Ross Tree sits down with the residential or commercial property owner to discuss all options before treatment commences. For environmentally friendly plant health care services, click here to fill out a service request form or call 303-871-9121. We are at your service.

Licensed and Certified for Insect Control 

Ross Tree’s motto “Integrity in Action” means we are committed to minimizing our impact on the environment when delivering plant health care services. We promise to use the products necessary to treat your trees and nothing more. We deliver on this promise because our staff possesses the proper training and credentials to treat trees properly in the Denver area. Ross Tree has three Qualified Supervisors licensed by the Colorado Department of Agriculture to handle pesticide products.

What Are Systemic Tree Injections?

Trunk injections treat your trees for various tree insects found in the Denver area, including Aphids, Emerald and Lilac Ash Borers, Mountain Pine, and IPS Engraver Beetles. We also inject nutrients and antibiotics to correct deficiencies or control tree diseases. Ross Tree uses systemics products to treat the following tree insects:

Emerald Ash Borer (EAB)

The EAB is here to stay. Since the beetle is moving up and down the Front Range, it is just a matter of time before it arrives in Denver. American Ash trees have zero immunity to the EAB and will die if not treated. So, prevention is the best tactic to save high-value Ash trees against the EAB. EAB control products are also effective against the Peachtree, Lilac, Ash Borers, and the Zimmerman Pine Moth. Click here for our handbook on the Emerald Ash Borer.

Elm Leaf Pests

Elms need some extra help in Denver since they are not native trees. Wet springs support large infestations of the Elm Leaf Beetle. We use systemics products to control the Elm Leaf Beetle and the Elm Leaf Miner, European Elm Flea Weevil, and Japanese Beetles. Click here to link to our handbook on Elm Leaf Pests. 

Soft Body Tree Pests

Tree aphids and scales become serious tree pests when Denver has a wet spring. Many of these pests are tree species-specific. Applying dormant oils in the winter or systemic injections in the early spring controls many scale insects found in the Denver area. On the other hand, hot summers support the growth of the Honeylocust Spider Mite. Systemics are effective against this mite. Click here for more information on Spider Mite control. 

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Pine Tree Care Handbook

How Do I Keep My Evergreen Trees Healthy In Denver? Ross Tree publishes handbooks on key tree issues common to the Denver area. The Pine Tree Care Handbook identifies pines and other conifers that grow here and the insects and diseases that inflict them. Colorado has...

Winter Tree Care Handbook

Close of the Year Tree Services Ross Tree, a local tree company in business since 1978, operates twelve months of the year and provides fall and winter tree care services throughout the Denver area. The most popular late fall and winter tree services are deep root...

Tree Pests to Watch Out for in August in Denver

This August, two tree pests are having a field day in Denver - the Elm Leaf Beetle and the Honeylocust Spider Mite. Our wet spring set up conditions for the Elm Leaf Beetle to thrive and attack Elms across the city. Consecutive 90 degree days this summer is perfect...

How Do I Get My Trees Ready For The Summer?

Summer Tree Care Tips As Ross Tree's General Manager explains in the video below, summer is an excellent time to get your trees ready to withstand Denver's unpredictable weather. He recommends increasing deep rooting feeding to at least two times during the growing...

What to do after planting a new tree?

Newly Planted Tree Care Tips Wondering what to do after planting a new tree? Below are some tips after the tree is in the ground. For the last 35 years, Denver Digs Trees has been a significant force in expanding the City’s urban forest by providing more than 60,000...

Preparing Trees for Denver’s Heavy Spring Snowstorms

Channel 9 News recently ran a story on "How To Remove Snow From Your Trees During An April Storm." After the spat of snowstorms Denver experienced in March and April, many homeowners wished they had hired a professional tree company for winter tree pruning to avoid...

Emerald Ash Borer Handbook

The Emerald Ash Borer Is Here to Stay To help our customers, Ross Tree, a locally owned and operated Denver tree company, created an Emerald Ash Borer Handbook to inform home and business owners about this troublesome iridescent green beetle. The Emerald Ash Borer...

Sometimes It is Best to Call a Professional Tree Company

Large Cottonwood Tree Removal  Tree removals next to homes, sheds, garages, fences, and streets need special care. Large trees are heavy, and when cut down, sometimes fall unpredictably, which is dangerous. Ross Tree, a Denver-based tree company, is known for pruning...

Ask a Professional – Why Use Systemic Products to Control Tree Pests?

Systemic Tree Injections  Ross Tree, a leading innovator in tree insect control, recommends tree systemic injections to control tree insects. We were the first tree company in Denver to offer tree injections, a practicable alternative to spraying trees. Using...

A Short Guide to Aspen Trees and Their Care

How to Care For Your Aspen Trees Colorado has a higher percentage of the species growing within its borders than any other state. Aspens thrive in higher elevations. Planting these trees in Denver with our heavy clay soils and hot lowland weather takes its toll,...

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