.....I have 10 res accounts and 9 of them are getting these large, spread out, rusty brown spots...Some worse than others. One is sooo bad that she canceled her service because the whole lawn is lookin like a hay field. Im terribly concerned that other customers will follow suit as there wont be any lawn to mow here in a month or so.. One of them we recently areated, and fertilized..Its the worst. Large sections are dying! Ive noticed it all over town. Even the city maintained grass, and some golf courses are getting it.. I cannot afford to loose these accounts. I figure its a fungus of somekind. This is my first year in the business and I have no idea what to do,, Please help.