Quote:
Originally Posted by Michigan Farmer
I got a nice broad leaf kill on a St. Augustine lawn earlier this year with a split application, 7 to 10 days, of Trimec, and a bit 80/20 surfactant. I think the Trimec came from Tractor Supply in Leesburg if you cant find it locally.
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First of all titles are deliberately misleading. In my view the reason is so people-wholesalers-retailers san MISLED the buyer to claims ours is better than theirs. If, you read the label you will find your trimec product is just another name for 24D. The 24D was discovered, invented by the British for WWI (1918) so it is long out of patent.
As to effectiveness, the weather is very important-rain will wash it off. Zoysia is more tolerant to the broad leaf weedkillers (24D) than is St Augustine. If, you apply 24D to St Augustine ON A HOT DAY, it could well kill your lawn.
Applying every 7-10 days-depending on the type of weed you are killing or attempting to kill it can take about 2 weeks for 24D to work.
A secret that no licensed guy can tell you if they know.
If, you have a zoysia lawn being invaded by St Augustine,
you can mix 24d extra strong and it will kill St Augustine and hopefully not the zoysia. Do it in a spot to try it.
Don't blame me if it doesn't work. My rule-do not overdo anything. You can do things again you cannot always undo what you have done.