What is Sphaeropsis Shoot Blight?
Sphaeropsis Shoot Blight, formerly known as Diplodia, is a serious disease of many pine species and other conifers. Sphaeropsis kills many on the growing points on branches, which eventually leads to the death of the branches. Austrian Pine is a commonly affected ornamental.
What are the symptoms and effects of Sphaeropsis Shoot Blight?
Resin droplets are often the first indication of Sphaeropsis Shoot Blight. They exude from small, discolored lesions on needles and shoots. The lesions grow in size, and needles turn yellow, then reddish-brown as they die. Needles on affected shoots may not grow to full length and may die prematurely. They may also stick together due to abundant resin flow.