Phytophthora Root and Crown Rot of Fruit Trees (2008)
    hytophthora root and crown rots (sometimes called collar rot) are common and destructive diseases of fruit trees throughout the world. Above-ground symptoms vary between tree species, but generally include reduced tree vigor and growth, yellowing or chlorosis of leaves, and eventual collapse or death of the tree. (HYG-3029-08)

Bacterial Crown Gall of Fruit Crops (2008)
Crown gall is caused by the bacterium Agrobacterium tumefaciens. This bacterium has the widest host range of any plant pathogen. All fruit crops grown in Ohio are susceptible. The disease is particularly destructive on brambles (raspberries and blackberries) and grapes. (HYG-3301-08)

White Pine Blister Rust on Currants and Gooseberries
    White pine blister rust is not a serious disease of currants and gooseberries; however, it is a very serious disease of white pines (Pinus strobus). White pine blister rust causes significant damage in pine forests by forming cankers on the branches of white pines. These cankers ultimately kill the trees. (HYG-3205-08)