Lawn Dying From ?
I had a fungus in my lawn early this summer. At first glance, or looking at it from a distance, it appeared to be suffering from drought. My local nurseryman told me to bring in some sample blades of grass. He showed me that some blades were totally white, dry, and dead. Others had brownish spots/streaks on them in varying degrees of severity. He sold me a granular fungicide (can't remember the name) that was also expensive--about $80 bucks to treat 5000 sq. ft.
He said to use the 'Rule of 150' to know when to start treating for fungus. That is when you take the daily high temperature and add the humidity level to it. If the total is 150 or higher, then conditions are ripe for fungus to develope. The preventative chemical rate of what I used is half that of the currative rate so it's much cheaper to catch it before it starts. My lawn was too badly affected already to save the front lawn. I'll be reseeding in the next couple of weeks but next year I'll catch it early.