"jim evans" wrote in message
...
I seem to have chinch bugs in this area in early fall every three or
four years. Whatever this is, it's about a month to a month and a
half late and the "tin can test" didn't show chinch bugs. Is this St
Augustine decline, which I've never had before?

http://factsfacts.com/st_augustine.htm

If so, do I do anything about it?

You have brown patch, very common in October-November. Cinch bugs are seen
in the summer, brown patch appears when it gets cooler. You can knock it out
with a fungicide. Don't waste your time with a pesticide.