Question: Our crabapple trees have spots all over their leaves. What disease is it?

Answer: Cedar apple rust. Crabapples are one of the two hosts for the fungus, the other being eastern redcedars (junipers). Fungicides applied during the spring may help, but you may eventually just want to switch out to some other type of small tree. If there are native redcedars in your area you’ll end up spraying the crabapples several times every year. The disease is not nearly as damaging to the redcedars as it is to the apples.