The first picture is a close up of infected leaf blade. Second picture is one of many brown patches that has developed in my tall fescue. This disease is called brown patch. It is common during hot and humid weather. Dew on the lawn and morning temperatures 65 degrees or higher will trigger the disease. I just live with it. There are preventative fungicides labeled for use. For more information go to http://www.plantpath.ksu.edu/DesktopDefault.aspx?tabid=551
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