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Scott Tunnock, USDA Forest Service,
Pine Needle Scale - Articles Articles
The pine needle scale is a key native pest of pine, Douglas-fir, spruce, and cedar in landscapes, nurseries, and Christmas tree plantations in Pennsylvania. More
A. Steven Munson, USDA Forest Service,
European Pine Sawfly - Articles Articles
The European pine sawfly is common in Pennsylvania. The larval stage feeds on the needles of pine trees in landscapes, nurseries, and Christmas tree plantations. More
Douglas-Fir Diseases
Douglas-Fir Diseases - Articles Articles

Douglas-Fir Diseases

Gary W. Moorman, Ph.D.

Informational table showing disease name, symptoms, pathogen/cause, and management of Douglas-Fir diseases. More
Fruiting bodies on cone scales
Diplodia (Sphaeropsis) Tip Blight on Pine - Articles Articles
Austrian, Scots, ponderosa, mugo, red and other 2 and 3-needled pines are susceptible to the killing of shoot tips and branches by the fungus Diplodia pinea (formerly Sphaeropsis sapinea). More
Diagnosing Poor Plant Health
Diagnosing Poor Plant Health - Articles Articles

Diagnosing Poor Plant Health

Gary W. Moorman, Ph.D.

Many things make plants unwell and pests and diseases are only two causes of poor plant growth. More