Full TGIF Record # 227008
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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=125
    Last checked: 08/07/2013
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Publication Type:
i
Report
Author(s):Strahan, R. E.; Beasley, J.; Borst, S.
Author Affiliation:LSU AgCenter, Baton Rouge, LA
Title:Salvage large crabgrass (Digitaria sanguinalis) control options in bermudagrass athletic turfgrass
Section:Posters
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Meeting Info.:Charleston, South Carolina: January 23-25, 2012
Source:2012 Proceedings, Southern Weed Science Society. Vol. 65, 2012, p. 53.
# of Pages:1
Publishing Information:Champaign, Illinois: Southern Weed Science Society
Keywords:TIC Keywords: Crabgrass control; Cynodon; Digitaria sanguinalis; Herbicide combinations; Herbicide efficacy; Herbicide evaluation
Abstract/Contents:"In the past, it has not been unusual for turfgrass managers to get complaisant and allow weeds such as large crabgrass (Digitaria sanguinalis) to mature to the point of seed head production before treating. Turf managers could successfully apply several repeated applications of MSMA eventually destroying mature large crabgrass. With the loss of MSMA turfgrass managers could have a more difficult and expensive time managing escaped weeds like large crabgrass. The following research evaluates several herbicides and herbicide combinations for salvage large crabgrass control in athletic fields. A field study was conducted in 2011 in Baton Rouge, LA in a common bermudagrass turf area with a very heavy natural population of large crabgrass (average 4 plants/foot2). The study was initiated July 10. No preemergence herbicides were applied in the area and weeds were treated when approximately 50% of the large crabgrass was producing seed heads. Herbicides evaluated in single and sequential applications included MSMA @ 2 lb ai/A, Drive XLR8 @ 0.75 lb ai/A, Drive 75 DF @ 0.75 lb ai, Celsius @ 0.15, and Katana @ 0.05 lb ai/A. Sequential applications of MSMA occurred 1 week after the initial treatment (WAI), whereas sequential Celsius, Katana, and Drive formulations were applied 2 WAI. Additionally, single applications of tankmixes of Drive XLR8 @ + Katana, Drive XLR8 + Celsius and Celsius + Katana were also evaluated. Herbicides were applied with a CO2 pressurized backpack sprayer equipped with 11003 XR flat fan nozzles that delivered 30 GPA at 23 psi. The area was mowed as needed and the height was maintained at 2 inches. Plot size was 6 ft x 10 ft. The area did not receive irrigation. Visual ratings of percent weed control and turf injury data were collected weekly. The experiment was conducted as a randomized complete block with 3 replications. Data were subjected to analysis of variance (P=0.05) and means were separated using Fisher's LSD. Two applications of MSMA were most effective as a salvage treatment controlling approximately 90% of the large crabgrass 6 weeks after the initial treatment (WAI). Two applications of Drive XLR8 were significantly better than two applications of Drive 75 DF (73% control versus 35% control). Celsius + Drive XLR8 and Katana + Drive XLR8 provided similar levels of control (63% and 57%) but did not perform better than sequential applications of Drive XLR8. Sequential applications of Celsius, Katana, and single applications of the tankmix of Celsius+Katana all gave similar large crabgrass control (45%, 45%, and 40%, respectively). Single applications of Katana and Celsius were very ineffective on the mature crabgrass (<15%) by 6 WAI. Results of this study indicate that successful control of escaped large crabgrass will be less effective without MSMA. Two applications of Drive XLR8 may be the most effective available option when compared with other herbicides that have large crabgrass activity."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Strahan, R. E., J. Beasley, and S. Borst. 2012. Salvage large crabgrass (Digitaria sanguinalis) control options in bermudagrass athletic turfgrass. South. Weed Sci. Soc. Proc. 65:p. 53.
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http://www.swss.ws/wp-content/uploads/docs/2012 Proceedings-SWSS.pdf#page=125
    Last checked: 08/07/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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