Brian from Fort Myers, Fl writes
Amtide MSM 60 DF can be applied to St Augustine though you should note some chlorosis or stunting of the turfgrass may occur following the application. Amtide is labeled to control dollarweed though a second application may be required after 4-6 week for complete control. Amtide is not labeled to control violets. The only selective herbicide that can be used on St Augustine and is labeled for both violets and dollarweed that comes to mind is Image 70DG.
Answer last updated on: 03/25/2013