Entomology and Plant Pathology, Oklahoma State University
127 Noble Research Center, Stillwater, OK74078
Vol. 11, No. 5
Feb 1, 2012
An Update on Rose Rosette
Damon L. Smith, Extension Horticulture Pathologist
Late last fall and this winter I have received lots of questions regarding rose rosette, its importance, and how to control the disease. There has been considerable confusion about rose rosette. Much of this is related to the fact that little detail is known about the disease among plant pathologists.
Rose rosette was first described as a disease of rose in the 1940s. Rose rosette is widespread in wild rose stands east of the Rocky Mountains. Symptoms include leaflet distortion, bright red leaf pigmentation (Fig. 1), witches’-broom (Fig. 2), and canes that grow slow and are excessively thorny (Fig. 3).
Fig 1. Bright red leaf pigmentation caused by rose rosette disease. (Photo Credit: James Amrine, West Virginia University, www.bugwood.org).