The larva of this moth species is a borer that attacks pine tree trunks and lateral branches. Typically there will be large collections of sap along the first 10 feet of the tree. These clumps that contain insect eggs are easily broken away from the trunk structure. You may also see individual branches dying back.

Zimmerman Pine Borer Up Close

What Will Happen To My Landscape?

If left untreated, Zimmerman moth will reproduce and spread from Austrian pine to Austrian pine. A severe infestation will lead to the loss of the pine.

What Can I Do About Zimmerman Moth?

Regular horticultural maintenance of the pines requires the homeowners to peel away the border masses from the trunks of the tree. These masses should be destroyed to control populations of Zimmerman moth. Make sure the trees are adequately watered to avoid stress. Both cultural and chemical controls may be required to control the borers. Most local hardware stores carry insecticides that will control Zimmerman moth. Because these sprays can cause injury to certain plants, read the label thoroughly before using and apply according to the directions. Depending on the severity of the damage, more than one insecticide application may be required for complete control. Combating Zimmerman moth can be a timely and unpleasant weekend task!

How Can Natural Way Help?

Prevention is the key in controlling Zimmerman moth. Here at Natural Way we have certified professionals who are used to preventing and controlling insects like Zimmerman moth. Our 6 Point Protection Program will provide several critically timed sprays to the landscape that will help control Zimmerman Moth, extend the life of the landscape and minimize overall damage. We also recommend scheduling timely trunk injections.

Zimmerman Pine Borer Damage

Photo of Zimmerman Pine Borer damage – Credit: Rayanne Lehman, Pennsylvania Department of Agriculture,