Shown here is an intimidating and odd-looking fungal growth attached to a cedar branch. It is called cedar apple rust. The airborne spores growing on the leaves and fruit of an apple tree will infect ...

Q: Last year I learned I had rust on my serviceberry and hawthorn trees. What do I look for this year to prevent that? A: It’s hard to prevent rust infections on vulnerable plants unless you are ...

The leaves of my apple tree have odd spots on them. What is this and what can I do about it? Although there are other possibilities, cedar-apple rust is a possibility, given your description, the wet ...