Question
can not buy asulux in fl. anymore,where can i get say a qt.do you know of anything else that kills carpet grass in st.augustine.

Answer
Carpetgrass -- 'Axonopus affinis' -- CANNOT tolerate Salt; prefers LOW pH (5.0 to 6.0) and thrives in LOW fertility; needs moisture.  People grow it in South Florida as a low-maintenance Turfgrass.

MSMA, aka 'Mono-Sodium Methane Arsenate', one of the deadliest, carcinogenic pesticides ever brought to market, was blamed for high levels of Arsenic in local drinking water around South Florida.  Greenskeepers had been using it for years to keep golf courses Weed free.  In 2006, the EPA reviewed registrations of MSMA, DSMA, CAMA and Cacodylic Acid.  The registrations were revoked: 'Benefits of organic arsenical herbicide use on turf are not compelling in light of the possible Cancer risk to the general population from drinking water contamination due to the use of these compounds.'  MSMA was in around 90 herbicides.

I've seen some people searching for Bayer Cropscience's Asulam, a carbamate herbicide which was de-registered a decade ago and is also considered dangerous.  Seems there's a rumor it can replace MSMA, which is still available on the black market.  Asulox was Sodium Salt of Asulam, Methylsulfanibyl Carbamate.

Much easier, much safer, and your life expectancy soars when you take a more practical approach to ridding your Lawn of this rug rat.

First, remember your St Augustine is not fussy about pH, but it is quite comfortable around pH 7.5.  Higher than that and it gets a little Yellow, but think how miserable the Carpetgrass will be.  You didn't mention your state or zip, but if you're in Florida, the high pH comes with the territory in calcareous Soil.  Those Soils are dripping with alkaline Calcium Carbonate (CaCO3), and that makes Carpetgrass GAG.  A finishing touch of Lime is all you need.

Next, consider that Potassium strengthens St Augustinegrass roots.  They grow faster and better.  It also makes the Grass less susceptible to a cold snap.  And it's less thirsty when it stops raining.

Boost your Soil's Potassium levels and you can shut off all sources of Water.  If it's raining, cover with clear plastic 'til showers end.  Yeah, your neighbors will scratch their heads, but who cares?  Dry out the Soil and watch the Carpetgrass BEG for Water as it Browns to a crisp.

Invigorate your St Augustinegrass with fortified Soil -- no, not the kind you get from bags of fertilizer.  The kind you get from organic matter.  Humus.  Peatmoss.  Compost.  Home Depot sells these things.  Your St Augustine will be more beautiful; the Carpetgrass will grow uglier and deader by the hour.

Finally, remember that St Augustine may not like Shade, but it won't mind it like your uninvited Carpetgrass will mind it.  Cover your weakened Carpet with black plastic garbage bags and it will be deader than a doornail.

Questions and comments invited.

L.I.G.