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…

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Tree Diseases: Butternut Canker (Sirococcus clavigignenti-juglandacearum)

Introduction Butternut canker is a fungal disease that attacks Juglans cinerea, also known as butternut or white walnut. The disease is caused by the pathogen, Sirococcus clavigignenti-juglandacearum. S. clavigignenti-juglandacearum is…

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