Colorado Tree Pests

A Guide To Common Tree Pests In Our Area

Terminals of blue spruce in Colorado repeatedly attacked by white pine weevil.

Is the Top of Your Spruce Tree Bending? It May be Damage from the White Pine Weevil

If the top of your spruce trees are bending and turning brown, they may be infected by the white pine weevil. Learn more about how this tree pest impacts Colorado trees in this article.

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Mountain pine beetle damage to lodgepole pines in Colorado.

How Wildfire Management makes Mountain Pine Beetle (and Other Pests) Worse

In this article, we will explain more about this strange relationship between wildfire suppression and tree pests, explore what can be done to change this pattern, and give you information on how to keep your Colorado property fire safe and your trees healthy.

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A wasp clings on to the bark of a tree.

Are your tree pests attracting wasps?

Wasps are different from bees. While bees provide benefits to our plants, wasps on the other hand, can cause harm to humans due to their stings. Learn why wasps appear in your Colorado property and know what you can do to ward them off.

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Mountain Pine Beetles

Periodic outbreaks of mountain pine beetles can destroy millions of trees in Colorado and other states. They develop primarily in pines and can spread rapidly. Here’s what you need to know about treatment and how to help stop the spread of mountain pine beetles.

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Signs of spruce budworm infestation on a tree in Evergreen, Colorado.

How to Identify & Get Rid of Spruce Budworms

Spruce budworms can cause serious damage. Identify and manage them early to save your trees & avoid further infestation. Here’s how you can get rid of them.

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squirrel on a snow-covered tree near evergreen colorado

How to Prevent Winter Rodent Damage to Your Trees

Voles, gophers, rabbits, and squirrels can damage or even kill trees during the winter. See our recommendations for how to keep your trees safe from rodent damage this winter.

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aspen trees in autumn

Aspen Trees: Common Problems & What To Do

Although Colorado’s aspen trees are beautiful, they’re also prone to a host of aspen tree problems. Thankfully, most are preventable or treatable – especially if you address the #1 issue nearly all aspens in our area face.

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apple buds with rain

How Spring Weather Affects Treatment Timing For Weeds, Insect Pests & Tree Diseases

Have you ever wondered why weeds, bugs, and plant diseases seem to appear earlier some years but much later other years? Unlike holidays and birthdays, the emergence of weeds and insect populations isn’t determined by a date on your calendar. Instead, timing is based on a combination of factors, with spring weather conditions being the most important.

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cytospora canker on aspen tree

Aspens Turning Orange? It’s Cytospora Canker

Cytospora canker causes dead or dying areas on tree bark. In aspens, this area turns orange. The cankers kill tree branches (you’ll often see this in spruce) and, in severe cases, will kill the whole tree. There’s no cure so prevention is critical.

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spider mite damage to underside of leaf

Spider Mites Suck Plants Dry

Spider mites are common and destructive pests in Colorado yards, including on trees of all kinds. Learn how to identify these tiny arachnids and control them before they kill your plants.

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Pine needle scale on pine tree needles

Scale Insects: Oystershell, Pine Needle & Striped Pine Scale

Scale insects can be extremely damaging to trees and shrubs in the Evergreen, CO region, causing leaf/needle discoloration, defoliation, stunted growth, limb dieback, vulnerability to other pests and diseases, and even plant death. Here’s how to identify scale insects, as well as treatment options and timing.

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prevent pest and disease on trees

How to Prevent Insect & Disease Problems on Trees & Shrubs

Getting an early start on dealing with insect and disease issues can make all the difference between a beautiful, healthy landscape and one that’s plagued by problems all season. By focusing on prevention, rather than reacting to disease and pest infestation when it happens, you save money that may be spent on unnecessary pesticides and get to enjoy a more attractive environment.

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Aphids

Aphids Cause Sticky Leaves & Black Patches

Aphids are small insects that suck the sap from plant leaves, twigs and stems. They excrete a sticky substance called honeydew (often mistaken for sap “bleeding” from the tree) that can develop sooty mold (a black coating on leaves and surfaces). Treatment and prevention are possible. Read more for the details.

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ips beetle damage in Colorado foothills

Ips Beetle – A Killer of Pine and Spruce Trees

Ips beetles are a frequent problem in Colorado, including here in the Denver foothills where they can kill whole forests in a single season. They’re especially problematic during periods of prolonged drought.

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dwarf mistletoe on juniper - close up

Dwarf Mistletoe – The Facts

This common parasitic plant makes its home on pine trees. It’s a weed! We can prune it out of your trees or spray to keep it from spreading. Every situation is different, so let a Certified Arborist help you mitigate Dwarf Mistletoe problems.

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Cooley Spruce Gall

Cooley Spruce Gall Adelgid

Cooley spruce galls are common in Colorado and are often seen on blue spruce. The galls are caused by the Cooley spruce gall adelgid (or wooly aphid). But while they may look alarming, Cooley spruce galls usually do little or no damage to the tree.

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CONTACT US

LAM Tree Service, Inc.
P. O. Box 2486, Evergreen, CO 80437-2486

Physical Location:
30476 Bryant Drive, Evergreen, CO

Phone: 303-674-8733

HOURS

Monday—Friday: 8:00AM–4:00PM
Saturday & Sunday by appointment only