Turf Weeds at Virginia Tech

Turf Weeds was developed to provide weed management information and newsearch reports to turfgrass managers. This site contains information on weed identification, chemical and cultural management of weeds, and current topics relevant to weed management in lawns and professional turf. Turf Weeds was created by Dr. Shawn Askew, Assistant Professor of Turfgrass Weed Science at Virginia Polytechnic Institute & State University.

Home

Weed ID

Weed Control during Bermudagrass Seedling Establishment

Description:
Author:	S. D. Askew, J. B. Beam, and W. L. Barker
Author Org:	Virginia Tech
Date:	01/28/2005
Presenter:	S. D. Askew
Conference:	Southern Weed Science Society
Location:	Memphis, TN
File Formats:
Abstract:	The recent release of high quality seeded bermudagrass cultivars such as ‘Princess’, ‘Riviera’, and ‘Yukon’ have increased demand for bermudagrass seed. Since the most widely used chemicals available for weed control during bermudagrass sprigging can’t be used at seeding, research is needed to evaluate selective herbicides for weed control during bermudagrass establishment from seed. Greenhouse and field studies were conducted at Blacksburg, VA to evaluate several herbicides for bermudagrass tolerance at seeding (PRE) and 3 weeks after seedling emergence (POST). In field evaluations, best tolerance and cover of Riviera and Yukon bermudagrass was achieved with quinclorac applied PRE at 0.63 kg ai/ha followed by quinclorac at 0.42 kg ai/ha POST or MSMA at 1.9 kg ai/ha four weeks after emergence followed by MSMA + 2,4-D + dicamba + MCPP eight weeks after emergence. The following chemicals did not significantly injure seeded bermudagrass when applied PRE: foramsulfuron, rimsulfuron, sulfosulfuron, and quinclorac at less than 0.9 kg ai/ha. The following chemicals were too injurious when applied at bermudagrass seeding: bispyribac, atrazine, mesotrione, ethofumesate, nicosulfuron, primisulfuron, cyanazine, diclosulam, flumetsulam, imazapic, sulfentrazone, siduron, quinclorac at greater than 0.9 kg ai/ha, metsulfuron, chlorsulfuron, pronamide, flazasulfuron, imazaquin, and flumioxazin. The following chemicals did not significantly injure bermudagrass when applied 3 weeks after emergence in the greenhouse: dicamba, 2,4-D, diclosulam, flumetsulam, MSMA, foramsulfuron, rimsulfuron, trifloxysulfuron, metsulfuron, chlorsulfuron, sulfosulfuron, halosulfuron, bromoxynil, bentazon, sulfentrazone, bispyribac, quinclorac, dithiopyr, pendimethalin, and prodiamine. The following chemicals were too injurious to warrant use early POST: atrazine, 2,4-D + dicamba + MCPP, triclopyr, triclopyr + clopyralid, and fenoxaprop. These preliminary studies indicate that weed control in seeded bermudagrass should be attempted using herbicides applied early POST rather than PRE. Future studies will evaluate specific programs for weed control.

This site uses JavaScript 1.1 and should be viewed with Microsoft IE or Netscape versions 4.0 or higher. If you experience problems, check to see that your browser is JavaScript compliant or download the appropriate plug-in. To access the member area, click here. Contents © 2001-2003, Shawn Askew, Turfgrass Weed Science, Virginia Polytechnic Institute & State University.