Hello - I just moved to a new house and am getting acquainted with the new plants. After returning from vacation I noticed that two of the shrubs are coated in what looks like powdery mildew. Want to confirm that it is what I think it is, and what if anything I should be doing (or if just to leave it alone). Both shrubs are somewhat overgrown, so it's on my list to prune them whenever it makes most sense. I don't know if the overgrowth makes them more susceptible. Appreciate any feedback on how to best care for these two species. Thank you! Shrub 1 - High bush cranberry (?) Shrub 2 - Magnolia. I noticed tonight that this one was also strangely covered in flies. Mildew or whatever it is is coating many of the smaller branches.