Full TGIF Record # 148842
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Web URL(s):http://www.turf.uconn.edu/pdf/research/reports/2008.pdf#page=115
    Last checked: 06/09/2009
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Kaminski, J. E.
Author Affiliation:Department of Plant Science and Landscape Architecture, University of Connecticut, Storrs, Connecticut
Title:Pre- and early-postemergent control of false green kyllinga in southern New England
Section:Scientific publications (abstracts & citations)
Other records with the "Scientific publications (abstracts & citations)" Section
Source:2008 Turfgrass Research Report [Connecticut]. 2009, p. 112.
# of Pages:1
Publishing Information:Storrs, CT: Department of Plant Science, University of Connecticut
Keywords:TIC Keywords: Herbicide efficacy; Herbicide evaluation; Herbicide recommendations; Kyllinga gracillima; Postemergence weed control; Preemergence weed control
Abstract/Contents:"Although false green kyllinga (Kyllinga gracillima L.; FGK) is a common weed problem on golf courses in the southern region of the United States, its presence in southern New England is rare. A severe infestation of FGK, however, has been observed for several years at a golf course located in Greenwich, CT. Although a perennial, FGK populations in CT appear to disappear during the winter months only to regenerate by seed and/or surviving stolons in the spring. No information currently is available with regards to herbicide efficacy or application timing to control FGK in the northern United States. The objective of this study was to evaluate sulfentrazone, sulfentrazone + prodiamine, prodiamine, and mesotrione for selective control of FGK when applied at a preemergent (PRE) and early-postemergent (EP) timing. In 2007, a field trial was conducted in a golf course rough at Burning Tree Country Club located in Greenwich, CT. The turfgrass area was dominated by Kentucky bluegrass (Poa pratensis L.), but also contained small percentages of annual bluegrass (Poa annua L.) and perennial ryegrass (Lolium perenne L.). The area was mowed approximately 2 times per week to a height of 2.0 inches. Sulfentrazone (0.125 and 0.250 lb ai/A), sulfentrazone + prodiamine 4SC and 0.3G (0.375 and 0.750 lb ai/A), prodiamine (0.5 lb a.i./A) and mesotrione (0.125, 0.188, and 0.250 lb ai/A) were applied in two timings (1 and 17 May) just prior to and immediately following the emergence of FGK. All mesotrione and carfentrazone treatments were applied with the non-ionic surfactant X-77 at 0.25% (v/v). All sprayable treatments were applied in a 44 gpa using a CO2 pressurized (40psi) sprayer equipped with a flat-fan nozzle. Granular treatments were applied using a shaker bottler. Plots measured 6 ft x 6 ft and were arranged in a randomized complete block design with 4 replications. Control of FGK was rated on a percent scale where 0 = no visible FGK and 100 = entire plot area covered with FGK. Populations of FGK in the untreated control plots averaged 70% on the final rating date (17 July). At this time, excellent control (92 to 99%) was achieved in plots treated at the PRE timing with sulfentrazone (0.25 lb ai/A), sulfentrazone + prodiamine 0.3G (0.750 lb ai/A), and all rates of mesotrione. Only moderate to good FGK suppression (56 to 85%) was achieved from the PRE timing of sulfentrazone (0.125 lb ai/A), sulfentrazone + prodiamine 4SC (0.375 and 0.750 lb ai/A) and 0.3G (0.375 lb ai/A). When treatments were applied to newly emerging plants in the EP timing, excellent control (92 to 97%) was achieved in plots treated with sulfentrazone (0.125 and 0.250 lb ai/A) and the highest rate of sulfentrazone + prodiamine (SC and G formulations) and mesotrione. Moderate (59 to 73%) FGK control was achieved within plots receiving the 0.375 lb ai/A and 0.188 lb ai/A rates of sulfentrazone + prodiamine 4 SC and mesotrione, respectively. When applied at the EP timing, no FGK suppression was achieved within plots treated with sulfentrazone + prodiamine 0.3G (0.375 lb ai/A), prodiamine (0.50 lb ai/a), and mesotrione (0.125 lb ai/A), when compared to the untreated control. Our results suggest that FGK growing in the northeastern United States can be effectively suppressed with a single application of sulfentrazone or mesotrione when applied prior to or shortly after plant emergence."
Note:This item is an abstract only!
Geographic Terms:Southern New England
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kaminski, J. E. 2009. Pre- and early-postemergent control of false green kyllinga in southern New England. 2008 Turfgrass Res. Rep. [CT]. p. 112.
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    Last checked: 06/09/2009
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