Disease Fact Sheets from Penn State

Cytospora Canker

Blue and Norway spruces are susceptible to this branch-killing disease.

Douglas Fir Diseases

includes information on the following diseases: Rhabdocline needlecast, swiss needlecast and twig blight

Needlecasts

Affects douglas fir, spruce and pine. Includes Rhabdocline and swiss needlecasts (firs), Ploioderm, Lophodermium and Cyclaneusma needlecasts (pines), redband and brown spot pine needle blights and Rhizosphaera needlecast on spruce.

Phytophthora Root Rot

attacks woody ornamentals including fraser fir, hemlock and white pine

Pine Diseases

Includes Cyclaneusma needlecast, Spaeropsis tip blight, Ploioderm needlecast, Lophodermium needlcast, Needle rust, Pine-pine gal rust, Pine-oak gall rust, root rot and white pine blister rust

Sphaeropsis (Diplodia) Tip Blight

pine disease. Plant attacked in the spring and cankers form

Spruce Diseases

Includes Cytospora canker, Rhizosphaera needlecast, and needle rust