SPEEDWELL, VERONICA

Note:  Still not sure this is the right weed? The Turf & Weed Identification Decision Aid may help. Check the TurfFiles glossary for definitions of unfamiliar terms.

CULTURAL CONTROL

Persian speedwell is a low-growing winter annual weed found in turf, nursery crops, and waste areas. Winter annual broadleaf weeds germinate in the fall or winter and grow during any warm weather, which may occur in the winter, but otherwise remain somewhat dormant during the winter.  They resume growth and produce seed in the spring and die as temperatures increase in late spring and early summer.  They quickly invade thin turf areas especially where there is good soil moisture.  Shade may also encourage growth.  A dense, vigorous turf is the best way to reduce the encroachment of this weed.  First, select adapted turfgrass cultivars for your area and then properly fertilize, mow, and water to encourage dense growth.  Persian speedwell is similar in appearance to ivy and corn speedwell, but is easier to control than corn speedwell. 

CHEMICAL CONTROL

Postemergence Persian (veronica) speedwell control is achieved with products such as pronamide (Kerb), metsulfuron (Manor, Blade, etc.), or trifloxysulfuron (Monument) and also two, three, and four way broadleaf herbicides when applied in the fall or spring.

Note:  Recommendations of specific chemicals are based upon information on the manufacturer's label and performance in a limited number of trials. Because environmental conditions and methods of application may vary widely, performance of the chemical will not always conform to the safety and pest control standards indicated by experimental data. The order in which brand names are given is not an indication of a recommendation or criticism.

Recommendations for the use of agricultural chemicals are included in this publication as a convenience to the reader. The use of brand names and any mention or listing of commercial products or services does not imply endorsement by North Carolina State University or discrimination against similar products or services not mentioned. Other brand names may be labeled for use on turfgrasses. Individuals who use agricultural chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. Be sure to obtain current information about usage regulations and examine a current product label before applying any chemical. For assistance, contact your county's Cooperative Extension agent. 

© North Carolina State University. This information sheet was prepared by Fred Yelverton, Bridget R. Lassiter, Gail G. Wilkerson, Leon Warren, Travis Gannon, Jenifer J. Reynolds, and Gregory S. Buol. Department of Crop Science, College of Agriculture & Life Sciences, North Carolina State University. Prepared July 15, 2008. Available on-line at www.turffiles.ncsu.edu. This publication was made possible through a grant provided by the Center for Turfgrass Environmental Research & Education (CENTERE) whose purpose is to support worthwhile projects that will benefit both the private sector and the public, and protect the environment.