Zimmerman pine moth (Dioryctria spp.) is an injurious pest of pine trees in Nebraska. This insect attacks Austrian, scotch, jack, ponderosa, and white pine trees, and occasionally spruce. Zimmerman pine moth larvae damage trees by boring and tunneling beneath the bark of the trunk and branches, usually where the branch is attached to the trunk. Tunneling damage can girdle the trunk or branches, and physically weaken the tree. Infested trees show branch dieback, deformed growth, and may die.
The Nebraska Department of Agriculture (NDA) is responsible for assuring that the nursery stock distributed in Nebraska is free of injurious plant pests. Because Zimmerman pine moth is such an injurious insect, nursery growers and dealers need to be aware of the consequences of an infestation. When a Zimmerman pine moth infestation is detected in a nursery, an intense amount of management must occur. Control can only be achieved through a combination of proper sanitation practices and correctly timed chemical treatments.
The following policy and procedures have been adopted by NDA concerning Zimmerman pine moth infested nurseries: