The Most Opportunistic Tree Pests

Aphid Insects


Aphids feed on Hackberries, Pecans, Elms, and other tree species. They are tiny and pear-shaped. They do not cause a lot of damage, but their droppings (also known as honeydew) can lead to a “sooty” mold on the tree. The “honeydew” from the insects can also cause the ground underneath the tree to become sticky.

Scale Insects

scale insects on branch

Scales, as the name indicates, have the appearance of a scale. They commonly infest Crape Myrtles, but they can also be found on Magnolias, Elms, and other tree species. Like Aphids, they drop honeydew, which can lead to sooty mold on branches.

Bag worms

Bag worm

Bag worms are caterpillars that form a bag. These can be seen hanging from branches or twigs. Infestations can be very detrimental to a tree. They feed on Junipers, Cypress, Oak, Arborvitae, and other tree species.

Fall Webworms

Fall webworm

Fall webworms can be identified by the large webs that they form at the edge of the canopy. Fall webworms can defoliate a tree, causing severe damage. They can be found in many tree species in the area.

Emerald Ash Borer

Emerald Ash Borer on a leaf.

The Emerald Ash Borer (EAB) is an invasive species that has killed tens of millions of Ash trees in the United States. The destructive tiny green beetle tunnels into the bark, leaving a ‘D’ shaped hole in the trunk of Ash trees. To control the spread of the EAB, Ash trees must be injected with a systemic insecticide before infestation. An infestation will kill a tree and lead to further spread of the EAB.

What Can You Do?

If you live in Denton County, Texas, and you think that your tree is being attacked by a pest, please contact Tree Shepherds. One of our ISA certified arborists can analyze the situation and design a treatment plan that is quickly put into action.

Krista White

Krista White

Krista is a member of the marketing and education team at Tree Shepherds. A lifelong learner, she loves writing about anything from Hemingway to Quercus macrocarpa.