Leaf and fruit spotting leading to large fungal yellow or orange growths are found from infections of these plants. Cankers and fire blight are other disease problems to this group. Branch die back occurs with these diseases. Many of these diseases are common in Kansas. Scab, a diffuse leaf spot, also should be mentioned.
Defoliation can sometimes be extreme.
Everything else except bald cypress and gingko. Bald cypress and gingko have a great history for having few plant disease problems. During nursery dealer inspections this spring, staff have encountered various types of evergreens imported form Zelenka Nursery in Michigan that are infested with Canada Thistle and Quackgrass . These two weeds have been declared noxious in Kansas and are subject to official control and regulatory action. Infested plants cannot legally be sold.