DOLLARWEED - Knowledgebase Question

Ft. Lauderdale, Fl
Question by hazelB3
March 5, 2011
My lawn is overrun with d Dollarweed, WHAT CAN I DO?I have applied Scott's BonusS, IMAGE(Herbicide ConsumerConcentrate) to no avail.

Answer from NGA
March 5, 2011


Dollarweed is a water-loving plant that can float. The presence of dollarweed indicates that there is excessive moisture in the area. Research at the University of Florida demonstrated a reduction in dollarweed just by reducing irrigation frequency ( Monitoring moisture levels and evaluating irrigation frequency are the first steps to controlling dollarweed.

Antrazine (such as in Hi-Yield Atrazine Weed Killer, Image for St. Augustine & Centipedegrass, Southern Ag Atrazine St. Augustine Weed Killer, and Spectracide Weed Stop for Lawns Concentrate for St. Augustine & Centipede Lawns) can be applied to St. Augustinegrass and Centipedegrass up to two times a year. For maximum effect atrazine should be applied once in the fall and again in late spring (after spring green-up). Atrazine has a pre- and post-emergent effect on weeds, which means it helps to control both emerged weeds and weed seed.

Or, a three-way herbicide may be used safely on bermudagrass, zoysiagrass, centipedegrass, St. Augustinegrass and tall fescue. The active ingredients of a three-way herbicide include the following broadleaf weed killers: 2,4- D, dicamba, and mecoprop (MCPP). Examples of three-way herbicides are Ferti-lome Weed-Out Lawn Weed Killer with Trimec

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