Here's a photo submitted by reader Ted Swartzbaugh down in Ventura county of something you don't see too often.  Powdery mildew in raspberry which has advanced to the fruit, and if you look close you can even see evidence of the disease on the petiole. 

In the way of reminder, powdery mildew in raspberries (and blackberries for that matter), is favored by the warm and dry conditions of the macrotunnels so much in use these days.

If you want to know more information on how to manage this one, the UC IPM guidelines are just one click away!

http://ipm.ucanr.edu/PMG/r71100911.html

Many thanks to Ted for sharing this picture and his knowledge on the situation.