Cronartium quercuum, also known as pine-oak gall rust is a fungal disease of pine (Pinus spp.) and oak (Quercus spp.) trees. Similar to pine-pine gall rust, this disease is found on pine trees but its second host is an oak tree rather than another pine.

Hosts and symptoms

The pathogen requires pine and oak trees to complete its life cycle. Aecial hosts in North America

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