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Efficacy of Sodium Chloride Applications for Control of Goosegrass (Eleusine indica) in Seashore Paspalum Turf

Published online by Cambridge University Press:  20 January 2017

James T. Brosnan ,
Joseph DeFrank ,
Micah S. Woods  and
Greg K. Breeden
James T. Brosnan*
Affiliation:
Department of Tropical Plant and Soil Sciences, University of Hawaii, 3190 Maile Way #102, Honolulu, HI 96822
Joseph DeFrank
Affiliation:
Department of Tropical Plant and Soil Sciences, University of Hawaii, 3190 Maile Way #102, Honolulu, HI 96822
Micah S. Woods
Affiliation:
Asian Turfgrass Center, 77/1 Moo 3 Bangplee, Bangsai Ayuddhaya 13190, Thailand
Greg K. Breeden
Affiliation:
Department of Plant Sciences, University of Tennessee, 252 Ellington Plant Sciences Building, 2431 Joe Johnson Drive, Knoxville, TN 37996
*
Corresponding author's E-mail: [email protected].
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Abstract

Control of goosegrass is difficult in the pan-Pacific region. No herbicides are currently labeled for selective control of goosegrass in seashore paspalum turf, a species used regularly on golf courses throughout the tropics. Sequential granular applications of sodium chloride (99% sodium chloride, 1% sodium silicoaluminate, 83% 0.5 to 0.25 mm diam) at 488 kg/ha did not effectively (> 70%) control goosegrass in this study. Goosegrass injury following sequential granular applications of sodium chloride, at 488 kg/ha, subsided at 6 wk after initial treatment (WAIT). A single application of MSMA at 2.40 kg/ha plus metribuzin at 0.56 kg/ha provided 96 and 83% control of goosegrass 8 WAIT in 2007 and 2008, respectively. Sequential applications of MSMA plus metribuzin at lower rates yielded similar results. Applications of foramsulfuron did not effectively control (> 70%) goosegrass in this study, suggesting a possible tolerance to this treatment. Applications of MSMA plus metribuzin controlled goosegrass (> 70%), but induced phytotoxic injury to seashore paspalum turf. Additional research is needed to evaluate strategies for POST control of goosegrass in seashore paspalum turf that do not induce phytotoxic turfgrass injury after application.

Keywords

MetribuzinMSMAforamsulfurongoosegrass, Eleusine indica (L.) Gaertn. ELEINseashore paspalum, Paspalum vaginatum Swartz. PASVASalinityturfgrasschlorophyll meterchlorophyll indexseashore paspalumherbicideweed
Type
Notes
Information
Weed Technology , Volume 23 , Issue 1 , March 2009 , pp. 179 - 183
Copyright
Copyright © Weed Science Society of America 

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References

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