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Dallisgrass (Paspalum Dilatatum) Control with Foramsulfuron in Bermudagrass Turf

Published online by Cambridge University Press:  20 January 2017

Gerald M. Henry ,
Fred H. Yelverton  and
Michael G. Burton
Gerald M. Henry*
Affiliation:
Crop Science Department, North Carolina State University, Raleigh NC; 27695
Fred H. Yelverton
Affiliation:
Crop Science Department, North Carolina State University, Raleigh NC; 27695
Michael G. Burton
Affiliation:
Crop Science Department, North Carolina State University, Raleigh NC; 27695
*
Corresponding author's E-mail: [email protected]
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Abstract

Dallisgrass response to various MSMA and foramsulfuron herbicide combinations was evaluated from 2004 through 2006 in North Carolina. Dallisgrass control declined with herbicide rates; therefore, only the highest rates (foramsulfuron, 0.15 kg ai/ha; MSMA, 2.5 kg ai/ha) are discussed. Foramsulfuron followed by (fb) foramsulfuron 1 wk after initial treatment (WAIT) provided 60% control of dallisgrass 1 mo after initial treatment (MAIT), but control declined to 40% 3 MAIT. MSMA (2.5 kg ai/ha) applied three times provided 89% dallisgrass control 1 MAIT, but control declined to 71% 3 MAIT. Among 22 MSMA and foramsulfuron sequential application programs, MSMA fb foramsulfuron 2 WAIT fb MSMA 3 WAIT provided the highest control (94%) of dallisgrass 1 MAIT, and control levels remained high (93%) 3 MAIT. This herbicide program provided 85% control 1 yr after initial treatment (YAIT), whereas no other treatment provided greater than 37% control 1 YAIT. Timing of foramsulfuron application following the initial MSMA application affected the control of dallisgrass. Waiting 2 WAIT, rather than 1 WAIT, before applying foramsulfuron increased control of dallisgrass by 20% 1 MAIT and 19% 3 MAIT. However, the increase in control 1 YAIT was only 5% regardless of herbicide rate. The addition of a second application of MSMA following the application of foramsulfuron 2 WAIT of MSMA further increased control by 10% 1 MAIT, 37% 3 MAIT, and 48% 1 YAIT. Results from this study suggest dallisgrass may be controlled with applications of MSMA fb foramsulfuron 2 WAIT fb MSMA 3 WAIT applied during early to midsummer. The use of MSMA was required to achieve dallisgrass control, however, the relatively high level of control achieved 1 YAIT with a program including sequential applications of MSMA and foramsulfuron may help reduce the total amount of arsenical herbicides used to control dallisgrass infestations over time.

Keywords

Dallisgrass Paspalum dilatatum PoirPASDI, hybrid bermudagrass, Cynodon transvaalensis × Cynodon dactylon ‘Tifway’Turfgrassgolf coursealternatives to MSMA
Type
Research
Information
Weed Technology , Volume 21 , Issue 3 , September 2007 , pp. 759 - 762
Copyright
Copyright © Weed Science Society of America 

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