Powdery mildew is the bane of my existence right now!

I’ve had to remove several of our melon/squash vines thus far, and now the lilacs are next.

A baking soda/water concoction should help with mildly affected areas, but I’ve got some pruning to do.  (Photography by JL Shutterbug)

http://www.ext.colostate.edu/pubs/garden/02902.html