Click image for an enlarged view and more information.
C11.5. Pycnia with honeydew on barberry leaf.
C11.8. A "Rust Buster" medal given to schoolchildren who helped in the barberry eradication program.
C11.11. Cedar-apple rust on an apple leaf. Pycnia form on the upper side, and aeciospores are released from the lower side.
C11.12. Masses of aeciospores shower from an infected hawthorn tree. This quince rust pathogen is closely related to the cedar-apple rust fungus and shares junipers as alternate hosts. The aeciospores on the sidewalk have failed to infect a juniper.
C11.14. Asian rust of soybean caused by Phakopsora pachyrhizi on a leaf.
White pine blister rust