This disease is primarily a problem on green peach fruit, but can also occur on leaves and young shoots. It appears as a powdery white coating on infected surfaces, and new shoots and leaves may be distorted. It is caused by the fungus Sphaerotheca pannosa . Young fruit develop white, circular spots that may enlarge. Infected areas on fruit turn brown and appear rusty.
Symptoms usually occur on green fruit and disappear as the fruit develops.
This disease occurs frequently when roses are nearby. This disease is caused by a soil-inhabiting bacterium, Agrobacterium tumefaciens , which infects many ornamentals in the home garden. The symptoms are rough, rounded galls or swellings that occur at or just below the soil surface on stems or roots. Young galls are light green or nearly white in color. As they age, the galls become darkened and woody and range in size from small swellings to several inches across.