Rust fungus, despite a name that would make ... you might notice the development of pustules -- tiny, blister-like formations that range from rusty orange spots to tawny, brown, or even black ...

The tree is primarily threatened by an introduced fungal pathogen known as white pine blister rust. It is increasingly threatened by climate change, which is leading to increased fires and mountain ...

A research crew surveys trees for white pine blister rust disease in Sequoia and Kings Canyon National Park. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases ...