I'm here in Southern California, and I'm looking for some advice on a good pre-emergent. I have customers who I do crabgrass control for, which is easy, but the real problem is Poa Aunna. So I'm looking to stop it in the beginning. Any good advice for pre-emergents? What would be the ideal time to apply? I plan on aerating and starting my fert. program soon, so I'd like to know how to work it in. By the way I have some problems with a customers lawn and some disease in an area of the lawn. My customer bought the house as a forclosure and the bank put in some cheap sod. It has been just over a year, and the lawn does look fairly healthy and established, but I believe the disease may be dollar spots. Its an area of dark brown grass, if you could even call it that. Any help on either of these topics would be great. Appreciate the help.