Quote:
Originally Posted by Pondboy
So if I’m understanding the issue, you have perfect St Augustine Grass in your yard with the exception of some “Brown Spots” that only turn green after a rain.
How big are these brown spots? Are they round or different shapes?
I’m assuming that you have ruled out irrigation heads missing these areas and underground structures that are limiting the grass roots from reaching far down into the soil.
How about the suns reflection off of a window, hitting these spots and magnifying its intensity ?
Are you sure it’s St Augustine and not a weed such as crabgrass ?
How many inches of water does your system put down in these areas per week?
What does the grass look like before it turns brown? Do the leaf blades fold in or do they remain flat?
|
The Brown Spots in St Augustine, especially if they are concentrated near roads and driveway edges are most likely caused by an infestation of Chinch Bugs or Sod Webworms....it's prevalent in the southern part of The Villages. After checking with multiple sod experts I found this product (bought on Amazon)..
https://a.co/d/dJMSX4M. The key ingredient is Bifenthrin. I use it at the first signs of brown spot formation. I apply 2 applications, 2-3 weeks apart (the 2nd is to kill any new hatchlings that didn't get killed in the 1st application). I have had very good success with this procedure. There is instructions that come with the product, but to "cut to the chase" I use .5 fl oz per 2 gallons in a sprayer.