1. Any of several diseases of pines caused by rust fungi of the genus Cronartium and marked by destructive invasion of bark and sapwood and producing blisters externally
   "The forestry department implemented measures to control the spread of blister rust";
   - white-pine rust, white pine blister rust
    
2. Fungus causing white pine blister rust and having a complex life cycle requiring a plant of genus Ribes as alternate host
   "Blister rust has devastated many white pine forests";
   - Cronartium ribicola

Derived forms: blister rusts

Type of: rust, rust fungus

Part of: Cronartium, genus Cronartium

Encyclopedia: Blister rust