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 ...

The caller on the other end of the phone was worried: Her apple trees had suffered severely last year from cedar-apple rust disease, and she wanted to know how to keep them from being attacked again.

Pear rust is an extremely common pear problem that affects both ornamental and fruiting pear trees. The disease is called cedar-hawthorn rust and often causes only aesthetic damage in the form of 1/8- ...

Q: My eastern red cedar has a type of pod growing on several of the stems. This growth occurs in much smaller numbers on some of the other trees. This particular tree appears to be stressed with green ...