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 ...

You may see large orange looking balls on cedar trees showing up at this time of the year. If you look closely, you will find a round brown gall about the size of a quarter that encircles a branch.

Cedar-apple rust is one of several plant diseases that are all caused by different species of a fungus called gymnosporangium. All of these diseases are referred to as gymnosporangium rust diseases.

Rust disease is among the more interesting plant diseases because it requires two different plants to complete its lifecycle. There are a variety of rust diseases, including cedar-apple rust, Asian ...

QUESTION: Does cedar apple rust actually harm the cedar tree or is it just unsightly? We planted a crabapple tree nearby a few years ago, and now the cedar has a lot of those rust galls. If the rust ...

Q: The unusual orange growth in the photo is on my cedar tree. There are also a few smaller ones. What is it, and what should I do? — Dee H. A: The weird-looking growth on your evergreen is the ...

Cedars have a thing for apples. Apples have a thing for cedars. And when it rains, it shows. Cedar-apple rust is something that likely is showing after rains of recent weeks. Skiatook naturalist David ...

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 ...