I have fescue grass in N.C. I put out a grub control in the spring and around May 20 I saw a slight tough of brown in the grass, so i sprayed a fungicide on the yard about once every 3 weeks for 2 months now and now my grass looks like it has big dead spots all over it. We have had a lot of 90 degree weather and dry but I water regularly. we have lots of red clay. i aerate once a year. core aerator.