I've worked in Palm Springs, Orange County, CA, and AZ.
Let me say this about overseeding. In most cases, overseeding bermuda with perennial ryegrass is to the agronomic detriment of the bermuda. Thus, I understand Brad's stance against overseeding. But, as Jim Janosik writes, (an experienced desert Superintendent) there is exceptions to the rule. PUBLIC courses that do large volumes of rounds in areas where the bermuda goes totally dormant do have agronomic reasons TO overseed. The problem is, modern overseeding methods have gone overboard resulting in negative consequences for the year round golfer. Overseed is not a bad practice when it is properly executed. When it is used to mask problems with bermuda coverage, when the ryegrass becomes the primary turfgrass, or when it is done in temperate coastal climates, the negatives out weigh the positive benefits. But, when done properly, overseeding does have its applications. Brad, please don't blindly dismiss it as folly without fully researching the subject.