European Pine Sawfly, Neodiprion sertifer

If you’ve noticed masses or writhing, dark green “caterpillars” on your pine trees this spring, you likely have an infestation of European pine sawfly.  To learn more about this pest, read this article…

Zimmerman Pine Moth

While Zimmerman pine moth prefers Austrian and Scots pines, it will also attack Eastern white and mugo pines in the landscape. Learn about damage caused by this pest and control strategies in this factsheet.

Rhizosphaera Needle Cast

Rhizosphaera needle cast is the most common disease of Colorado blue spruce in Wisconsin, and can also affect other conifers. This factsheet covers identification and management of this disease.

White Pine Blister Rust

White pine blister rust is a serious, tree-killing disease of eastern white pine and its close relatives. Learn how to manage this disease in this factsheet.

Spruce Spider Mite

Spruce spider mites can attack a number of conifers including spruce, hemlock, arborvitae, larch and juniper. Learn about the life cycle and management techniques in this factsheet.

Phomopsis Tip Blight

Phomopsis tip blight is one of the most common fungal disease of conifers, including junipers, arborvitae, firs, larch and jack pine. This factsheet describes symptoms and management of this tip blight.

Pine Root Collar Weevil

Pine root colar weevil is a destructive pest of pines, including Austrian, Scots, red and Eastern white. Learn synptoms and how to protect your trees in this factsheet.

Cytospora Canker

Cytospora canker is one of themost common fungal diseases of Colorado blue spruce, and can also affect other spruce and firs. Learn about symptoms and management in this factsheet.

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