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1 April 2012 Nicosulfuron Use with Foramsulfuron and Sulfentrazone for Late Summer Goosegrass (Eleusine indica) Control in Bermudagrass and Seashore Paspalum
Patrick E. McCullough, Diego Gómez de Barreda, Paul Raymer
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Abstract

Late summer goosegrass control is difficult in turfgrass as POST herbicide efficacy is reduced on mature plants. Field experiments were conducted to evaluate single and sequential nicosulfuron applications tank-mixed with foramsulfuron or sulfentrazone for late summer goosegrass control and safety to bermudagrass and seashore paspalum. All single-treatment applications controlled goosegrass < 62%, whereas sequential sulfentrazone, nicosulfuron, and nicosulfuron sulfentrazone applications controlled goosegrass 52, 73, and 84%, respectively. Sequential foramsulfuron applications controlled goosegrass < 55% but nicosulfuron tank-mixtures did not improve control. Bermudagrass was injured < 20% by 1 and 3 wk after all single and sequential treatments. Sequential treatments of nicosulfuron alone or tank-mixed with sulfentrazone caused unacceptable seashore paspalum injury (> 20%) 1 and 3 wk after the second application, whereas foramsulfuron or sulfentrazone alone applied sequentially caused < 17% injury. Seashore paspalum seedhead control at 9 wk after intial treatment was poor (< 70%) from all single-application treatments and sequential sulfentrazone applications, but control was good (80 to 89%) to excellent (> 90%) from all other treatments. Overall, sequential treatments of nicosulfuron alone or tank-mixed with sulfentrazone appear to have potential for POST control of mature goosegrass in bermudagrass, but seashore paspalum injury was unacceptable.

Nomenclature: Bermudagrass, Cynodon dactylon L.; goosegrass, Eleusine indica L.; seashore paspalum, Paspalum vaginatum Sw.

Weed Science Society of America
Patrick E. McCullough, Diego Gómez de Barreda, and Paul Raymer "Nicosulfuron Use with Foramsulfuron and Sulfentrazone for Late Summer Goosegrass (Eleusine indica) Control in Bermudagrass and Seashore Paspalum," Weed Technology 26(2), 376-381, (1 April 2012). https://doi.org/10.1614/WT-D-11-00153.1
Received: 21 October 2011; Accepted: 1 January 2012; Published: 1 April 2012
JOURNAL ARTICLE
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KEYWORDS
goosegrass
herbicide
seedhead
turf
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