Tree Diseases: Rhabdocline Needle Cast (Rhabdocline pseudotsugae and Rhabdocline weirii)
Introduction Rhabdocline needle cast is one of the most serious diseases to afflict Douglas-fir. The disease is caused by the fungal pathogens Rhabdocline pseudotsugae and Rhabdocline weirii. When infected, Rhabdocline…