A Technical Report from The Bartlett Tree Research Laboratories

Weir’s cushion rust of spruce, also called spruce needle rust, is caused by the fungus Chrysomyxa weirii. This fungus is native to the western United States, but is now found throughout North America from Canada south through the southern Appalachian Mountains. The disease rarely kills spruce, but can seriously defoliate and disfigure trees creating a problem for nurseries, landscapes, and Christmas tree growers. Colorado blue spruce is the most commonly and seriously affected, but all spruce species are susceptible.



Related Content


  • Services

We specialize in a variety of services. Our aim is to deliver the top level of customer service based on your requests.


Telephone

703-397-8410

Location

P.O. Box 2340
Leesburg , VA 20177

Office Hours

Monday through Friday
8 a.m. – 4:30 p.m.

Appointments

Schedule an appointment
with your local office today!

Toast Text Goes Here
×