Question
live in Western Ky.  Have white powdery substance all over the branches of a weeping mulberry tree that I planted last spring.  This started at end of summer last year.  Have sprayed with fruit tree spray but hasnt helped.  Will It kill the tree?

Danny Sullivan

Answer
Sounds like powery mildew. Most fruit tree sprays are a combination of insecticides and a fungicide. I suggest using a fungicide and spray three times at a week to ten day interval, Here is a web link that discribes powdery mildew and lists the fungicides to use.  http://ohioline.osu.edu/hyg-fact/3000/3047.html