Black Canker and Scab of Willow

A Technical Report from The Bartlett Tree Research Laboratories

Black canker and scab of willow (Salix) are two diseases that often occur together. The term willow blight is often used in reference to simultaneous infections. These diseases cause defoliation and twig dieback that can lead to tree death. Black canker and scab occur throughout the eastern and central US and in the Pacific Northwest.