Apple scab is a fungal disease most common in areas of relatively high rainfall and relative humidity. However, scab outbreaks such as those that occurred in the early 1980's indicate that persons ass READ MORE http://gardening.wsu.edu/library/tree005/tree005.htm
Apple Scab is a common landscape tree disease due to the popularity of the Crabapple tree. Although Apple Scab will not directly kill a Crabapple tree it can weaken the tree thereby making it suscepti READ MORE https://www.natlarb.com/html/apple_scab.html