Rust diseases produce some of the most dramatic symptoms and signs we see on woody plants in the landscape. These fungi live up to the name of ‘rust’ diseases because the spore structures they produce on the plant are generally bright orange, as shown by these examples: Cedar-apple rust (https://www.purduelandscapereport.org/article/orange-koosh-galls-on-eastern-red-cedar/), Hollyhock rust (https://www.purduelandscapereport.org/article/jolly-hollyhock-rust/) and Buckthorn[Read More…]