By Cynthia
Michigan,
United States 
My crabapple tree has brown spots on the leaves and some turn completely brown and then fall off. Can anyone tell me how to treat this condition?
10 Jun, 2010
Answers
Thanks so much for the info. I assume the Copper Sulphate is save for flowers as I have several planted under the crapapple tree.
10 Jun, 2010
We have a lot of flowers under our Apple trees and none of them have suffered from fall out from spraying with Copper sulphate.
10 Jun, 2010
Thanks again. I will be getting some as soon as I get out of work today!!
10 Jun, 2010
Spray with Copper Sulphate (Bordeaux mixture) or a suitable systemic fungicide. It sounds like Apple scab which is not uncommon on Crab apples.
10 Jun, 2010