Calling all green-thumbs!

[_Redefined]

Is anyone a gardener or landscaper here? I have light green patches in my otherwise lush dark green centipede-grass lawn. I have no idea the first thing about lawn care. The extent of my lawn skills is mowing the lawn every couple of weeks and pulling out the weeds. We have fertilized with turf-builder a couple of times, but these patches are still there.

From what I googled just now, I think I should try a fungicide. Does anyone have any other suggestions or know what fungicide to get?

Thanks!

Signed,
The humble groundskeeper!