Unfortunately, numerous insects are not “friends” with trees. Emerald ash borers, gypsy moths, longhorn Asian beetles, and weevils are among the pests that affect their health. To help you keep up with tree maintenance, review signs indicating a woody perennial on your lawn has an insect infestation. 

What Signs Signal Insect Problems in Trees?

1. Exit Holes on Branches & the Trunk

Boring insects often attack already-stressed trees, such as those with a disease or extensive storm damage. They bore through the trunk and branches, creating tunnels that allow them to feed on inner bark. 

You’ll notice exit holes on the woody parts of your tree when it has a borer insect issue, such as a longhorned Asian beetle infestation. Other signs include loss of leaves, since a tree with internal health problems does not enjoy a steady flow of nutrients and water. 

2. Chewed Leaves

Several moths and “worms” chew on the leaves of plants to get their nutrients, including webworms, cankerworms, gypsy moths, and winter moths. Other pest insects known for feeding on leaves include tent caterpillars and leaf miners. 

Affected leaves feature holes, if not complete leaf tissue loss. Other signs include leaves that fall from the trees too early, such as in the spring or summer. Depending on the type of insect and the extent of the issue, you may also find nests or see the offending pests. 

3. “Sticky” Branches

If the branches or leaves of an infested tree feel sticky and appear shiny, they are covered in honeydew. It is a substance excreted by certain pests, such as whiteflies and aphids, after they feast on plant and tree sugars. 

If the honeydew issue has gone on for some time, you might see sooty black mold. This mold thrives on honeydew. It is also possible to see an increase in wasp, bee, ant, and fly activity on a tree with a honeydew problem, since they are attracted to the substance.

For professional tree maintenance services that help you stay ahead of serious insect problems, rely on Rivertown Tree Service LLC. These tree maintenance experts in Hastings, MN provide residents throughout the Minneapolis south metro and Hager City areas with a full suite of services, including storm damage cleanup and commercial tree care. Call (651) 438-3704 today to make an appointment or learn more about tree maintenance services online. Like the Facebook page for additional tree care tips.