Source(s): Jacob G Price
Pennywort (Dollarweed) is a perennial weed that is common in turfgrass as well as ornamentals. It is found in moist to wet sites or anywhere where there is excess moisture. Dollarweed reproduces by seeds, rhizomes, and tubers. In the United States it is found from Maine to Florida and several inland states.
Dollarweed has erect, long stalked leaves with scalloped margins. They look like miniature lily-pads. The petiole of dollarweed is in the center of the leaf. Dollarweed sometimes flowers in elongated spikes at the top of the stalk,
For centipedegrass, St. Augustinegrass, zoysiagrass, and dormant bermudagrass, Atrazine is labeled as a preemergence and postemergence control. Apply in early spring after green-up for summer control. Do not apply atrazine to unestablished sod, during greenup, to root zones of ornamentals,or to any cool season grass. Image or imazaquin can be used postemergence on the grasses listed above. Do not apply image to turfgrass during spring greenup or to newly planted grass. Manor (metsulfuron) provides good control on the grasses listed above. 2,4-D + MCPP + dicamba, which is Weed-B-Gon Lawn Weed Killer 2 or Ace Lawn Weed Killer, can be used on the above grasses but use half rates and spot treatments to minimize damage to Centipedegrass and St. Augustinegrass.
Image may be used over the top of a limited number of ornamentals, (refer to label). Roundup or Finale may be spot-sprayed in ornamentals if care is used to prevent drift.
Resource(s): Georgia Turf: Weed Management
Center Publication Number: 71