Good day all.
excessive watering on top of normal rain showers, like the ones we are having here in Florida, will cause Fungus and Sod Web worm damage to your St. Augustine grass.
Sod web worms will eat the leafs for the St. Augustine and cause it to lay down and look like there is a major issue to the grass.
First, during the summer, cut back time on the irrigation to around 20 minutes. per zone. keep a close eye on your grass to see if it starts to turn yellow. Yellow in a indication that fungus is starting to form. If you see this, call a Certified Lawn Pest control company to assist you with your issues.