Cedar Apple rust
We just noticed hundreds of orange spores on our juniper tree, which is 20 feet from our crab apple, which had yellow/ brown leaves last year that dropped off early. We are desperate not to lose these trees. What can we do? Please help.
Dakota County Minnesota
It is possible that the yellow/brown leaves on the crab may be simply apple scab, a common fungal disease of apples. The rust spots from cedar-apple rust are quite distinctive. Both diseases (cedar-apple rust and scab) rarely require management (on either host, in the case of cedar-apple rust). You are unlikely to "lose" your trees.
Read here about apple scab:
Removing the associated galls on the juniper is one management strategy for cedar-apple rust. But the short answer is that one should avoid planting these two trees near one another. Read here about cedar-apple rust: