Tree Pests & Diseases

LAM Tree 40th anniversary logo

Management & Treatment of Tree Pests & Diseases

Do your trees look like this?

  • Holes in the leaves?
  • Orange bark?
  • Yellowing leaves?
  • Bugs crawling on them?
  • Black mold on the leaves or below the tree?
  • Small white dots on leaves? Spider webs?
  • Brown, black or white lumps on leaves or needles?
  • Dying and falling needles?

If so, your trees are diseased or infested with pests!

Call us today at 303-674-8733 for a complimentary inspection.

We'll diagnose the problem and recommend a treatment that will bring your trees back to good health.

spruce spider mite - image by USDA Forest Service - Region 4 - Intermountain , USDA Forest Service,
cytospora canker on aspen tree
Striped pine scale - United States National Collection of Scale Insects Photographs , USDA Agricultural Research Service,

Tree Insect & Pest Control Programs

A wide range of insects is always present in the Colorado forest, including some that harm your trees and landscape. Pine bark beetles and the Ips beetle are just two, and create huge problems in our area (you can learn more on our page about controlling mountain pine beetle). We also have many other tree pests, like the Cooley Spruce galldwarf mistletoe and needle scale.

Two that are particularly prevalent in summer are -

Aphids - suck leaves dry and create black mold that sticks to leaves and whatever's beneath trees

Spider mites - Make small dots on leaves where they suck out sap, create webbing throughout the tree and you'll see dying leaves

Some, like the pine beetles, can kill your trees if not treated.

Treatment of Tree Diseases

Many of our local trees, especially aspens, are prone to disfiguring injuries (like deer or elk rubbing), as well as destructive diseases and pests such as those below -

Aspen leaf blight - aspen leaves fall off

Cytospora canker - aspen bark turns orange and the tree dies

However, with proper care, treatment and/or prevention - done at the correct time - the worst damage can often be avoided.



Tree injuries, diseases and insect pest problems need proper diagnosis and the right treatment to prevent damage and disfigurement to your trees.

Based on our analysis of the situation, we choose from a range of tree sprays and tree injections to quickly get the most effective treatment to the affected area(s).

Get A Free Quote

Call us at 303-674-8733 or contact us online to get a free estimate for managing insect pests in your landscape.

Plant Health Care Programs

If you're looking to create a healthy and beautiful landscape, then Plant Health Care (PHC) is for you.

It goes beyond pruning, general maintenance and occasional fertilization and instead focuses on preventing issues from arising in the first place.

Why wait for something to go wrong with your landscape (like pests, diseases, storms and fire) when you can proactively manage it to avoid most of the undesirable outcomes.

While we can't prevent all problems, we CAN maintain and improve your landscape's health, appearance, vitality and safety.

Timelines for Insect Pest Control Treatments

Ips Beetle

  • Late Feb. through Mid-April

Poplar Borer

  • March/April

Spruce Beetle/Douglas Fir Beetle

  • April/May

Cooley Spruce Gall/White Pine Weevil

  • April/May again August/Sept.

Tree Root Treatments

  • April/May or August/September

Aspen Fungus/Insects

  • Mid-April through July

Mountain Pine Beetle

  • May through July

Dwarf Mistletoe

  • Late July through August

Happy to report our trees that sustained early spring snow and hail are doing very well. They are fuller and healthier than we expected - lots of new growth on aspens, maples and blue spruce. The folks at LAM responded to my inquiry about their condition and expectations for spring/summer. I was advised the annual nutrients and fungal spraying would help the trees recover and leaf out. SPOT ON!!

Melissa McInnis

Service Area

Evergreen, Conifer, Pine, Bailey, Shawnee, Kittredge, Ideldale, Indian Hills, Morrison, Lakewood, Littleton, Wheat Ridge, Golden, Idaho Springs, Georgetown, Empire and the Surrounding Foothill Communities

ISA Certified Arborists · Licensed Pesticide Applicators (CO Dept of Agriculture)

Get A Free Quote

Call us at 303-674-8733 or contact us online to get a free estimate for insect pest control.


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

Physical Location:
30476 Bryant Drive, Evergreen, CO

Phone: 303-674-8733


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