Common Problems

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).

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

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.

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.