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Nuisance vine in grass #760383

Asked July 06, 2021, 8:48 PM EDT

Hello, what is this weed in the lawn and how do I kill it? Treated the lawn with 2-4-D alone and then later with Spectracide Weed stop which lists active ingredients as 2-4-D, Mecoprop-p, Dicamba, and sulfentrazone. All the weeds died and the grass looks great except for the presence of this one weed which seems to be getting stronger. It's not the normal ground ivy with the purple flowers - that also died with the herbicide application.

Ashtabula County Ohio

Expert Response

Dear Brian,

From your picture the weed appears to be common mallow. Have you seen flowers on this weed?  Purdue University says cultural and biological controls are not available but chemical ones are.  Since it reproduces from seed (generally), it is possible to manage common mallow through the use of preemergence herbicides. Postemergence herbicides can also be used to control common mallow. Two- or three-way mixtures of 2,4-D, dicamba, MCPP, or MCPA should provide adequate control. These products are available at local garden retailers and professional turf suppliers. Additionally, products that contain triclopyr, fluroxypyr, and quinclorac as one of the ingredients in a two- or three-combination herbicide will also work. In warm-season turf, metsulfuron (Manor) can control common mallow when applied in combination with a non-ionic surfactant (0.25%).  Please see the complete reference listed below for more information. 



Common Mallow | Purdue University Turfgrass Science at Purdue University

Vicki F. Replied July 07, 2021, 4:41 PM EDT

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