I should have put best growing grass in quotations. It is just an observation that some of the lushest nicest lawns tend to have dollar spot, or fusarium or other fungal problem due to the moisture they receive. Treatment isn't needed because it isn't enough to cause any real harm but it is there. And that is an important part of IPM. To know what is there, and to know when and what to do about it (if anything). I still state organics can have an important role in lawn care, but without chemicals lawns as we know them today are bye-bye.