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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2008 Proceedings-SWSS.pdf#page=186
    Last checked: 07/24/2013
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Publication Type:
i
Report
Author(s):Borst, S. M.; McElroy, J. S.; Breeden, G. K.
Author Affiliation:The University of Tennessee, Knoxville, TN
Title:Improved silvery-thread moss control in bentgrass putting greens with carfentrazone plus cultural practices
Section:Weed management in turfgrass
Other records with the "Weed management in turfgrass" Section
Meeting Info.:Jacksonville, Florida: January 27-30, 2008
Source:2008 Proceedings, Southern Weed Science Society. Vol. 61, 2008, p. 103.
Publishing Information:Champaign, Illinois: Southern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Agrostis stolonifera; Bryum argenteum; Carfentrazone; Cultural methods; Golf greens; Herbicide efficacy; Herbicide evaluation; Moss control
Abstract/Contents:"Carfentrazone is a protoporphyrinogen oxidase inhibiting herbicide utilized for broadleaf weed species control in turf. It has been labeled for silvery thread moss (Bryum argenteum Hedw.) control in creeping bentgrass (Agrostis stolonifera) putting greens. Carfentrazone controls Bryum argenteum when applied sequentially however, moss can reoccur and infestations can increase. Mancozeb + copper hydroxide (mancozeb) is also utilized for the control of Bryum argenteum, but control is inconsistent. Golf course cultural practices such as nitrogen applications and topdressing could potentially increase carfentrazone efficacy. Field studies were initiated in 2006 and 2007 to evaluate carfentrazone, mancozeb, and carfentrazone plus cultural practices. Research was conducted at The Crossing Golf Club (CC), Jonesborough, TN and The Honors Course (HC), Ooltewah, TN. Applications were conducted on established creeping bentgrass putting greens. Treatments were replicated three times and arranged in a randomized complete block design. Nine treatments; carfentrazone (0.1 kg ai/ha) applied alone, carfentrazone + topdressing (9800 kg/ha), topdressing alone, carfentrazone + nitrogen (11.9 kg/ha) + topdressing, carfentrazone + nitrogen, nitrogen alone, mancozeb (1.8 kg ai/ha), and topdressing + nitrogen. All treatments were applied two weeks apart. Mancozeb and cultural treatments were continued for 8 weeks after carfentrazone applications. Two applications of carfentrazone and mancozeb treatments were applied sequentially two weeks apart. Herbicides were applied in a water carrier volume of 280 L/ha with a CO2 pressurized sprayer equipped with 8002XR flat fan nozzles. Moss control and injury was evaluated visually using a 0 (no control) to 100 (complete moss control) % scale weekly. Moss reduction was calculated utilizing grid counts before treatments were applied and after study completion. Grid counts were made utilizing a meter x meter grid with 100 intersecting points. If moss was present in a grid intersecting point it would be counted and moss coverage would be assessed. For simplicity only visual ratings for 21 and 70 days after initial treatment (DAIT) and grid counts will be discussed. No bentgrass injury was observed with any treatment. At CC 21 DAIT all carfentrazone applications controlled Bryum argenteum 95%. Carfentrazone applied alone 70 DAIT controlled Bryum argenteum > 35%. Nitrogen and topdressing alone at CC reduced moss populations by 41 and 47% respectively. Carfentrazone + nitrogen reduced moss populations by 77%. All treatments at CC observed a reduction in Bryum argenteum populations. At HC 21 DAIT all carfentrazone applications controlled Bryum argenteum > 40%. Mancozeb increased Bryum argenteum populations by 78%. For both locations, 70 DAIT all treatments that included carfentrazone + nitrogen controlled Bryum argenteum >88%. Mancozeb at both locations controlled Bryum argenteum < 23% at both timings. Carfentrazone + topdressing reduced Bryum argenteum populations by 72 % at both locations. Carfentrazone applied with cultural practices reduced Bryum argenteum populations greater than carfentrazone applied alone."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Borst, S. M., J. S. McElroy, and G. K. Breeden. 2008. Improved silvery-thread moss control in bentgrass putting greens with carfentrazone plus cultural practices. South. Weed Sci. Soc. Proc. 61:p. 103.
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http://www.swss.ws/wp-content/uploads/docs/2008 Proceedings-SWSS.pdf#page=186
    Last checked: 07/24/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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