How to avoid Powdery Mildew

My wife asked me what was on our plants in the back yard...hmmm married to a Master Gardner and guess what we have?
Powdery Mildew!

This weather is perfect, cool to hold moisture then hot to promote fungus growth on a roller coaster ride and the plants are showing it.

Couple of rules to keep in mind. Plants (including your lawn) needs to be dry by nightfall - fungus grows when wet in the dark.
Number two is air movement is important - many back yards (especially with the plastic fences) have little to no air movement and create a humid enviroment that is ideal for problems.

If you don't want to tear down the fence we can spray a fungicide but it needs to be done sooner than later.
Which means I'm headed out to the back yard to spray right now.