Theodore H. Filer, Jr. - Principal Plant Pathologist, Southern Forest Experiment Station, USDA Forest Service, Southern Hardwoods Laboratory, Stoneville, MS.
Cordell C.E., Anderson R.L., Hoffard W. READ MORE http://www.forestpests.org/nursery/poplarcankers.html
Most poplar cankers in the prairies are caused by fungi. There are several different types of canker resulting in all poplar species being susceptible to at least one or more canker causing agents.
READ MORE http://www4.agr.gc.ca/AAFC-AAC/display-afficher.do...