Lawn Weed Problem

Daniel Gill  |  8/20/2015 2:41:01 AM

Picture of lawn with common lespedeza weeds.

Picture of lawn with common lespedeza weeds.

Picture of lawn with common lespedeza weeds.

Good afternoon Dan. I seem to have developed a lawn weed problem. At the beginning of the grass cutting season, it was sparse and spread out. Now it seems to be spreading in both sun and shade areas of my St. Augustine lawn.

I tried to ID the weed online but I can't seem to locate it.

I know that it is now late season and suspect that a remedy may have passed, but my questions are how do I deal with it now (if possible) and/or would a pre-emergent in the fall lick the problem?

As always, thanks and help!

- Percy R.

This is common lespedeza. Common lespedeza is very difficult to control. In research trials conducted by the LSU AgCenter, only herbicides Celsius (thiencarbazone + iodosulfuron + dicamba) or metsulfuron (MSM Turf, Manor, Mansion) managed lespedeza. Homeowner products like Weed B Gon and Ferti-lome Weed Free Zone do not provide good control of this weed.

You can just spot treat the patches of lespedeza. Make a second application if needed.

Dan Gill
Consumer Horticulture Specialist

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