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Web URL(s):http://www.newss.org/proceedings/proceedings_2008.pdf#page=119
    Last checked: 07/16/2013
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Publication Type:
i
Report
Author(s):Inguagiato, J. C.; Murphy, J. A.; Clarke, B. B.
Author Affiliation:Rutgers, The State University of New Jersey, New Brunswick
Title:Anthracnose disease management with plant growth regulators
Section:Symposium: The latest in plant growth regulators for turfgrass use
Other records with the "Symposium: The latest in plant growth regulators for turfgrass use" Section
Meeting Info.:Philadelphia, Pennsylvania: January 7-10, 2008
Source:Proceedings of the Sixty-Second Annual Meeting of the Northeastern Weed Science Society. Vol. 62, 2008, p. 101.
Publishing Information:Baltimore, Maryland: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Anthracnose; Colletotrichum graminicola; Disease control; Ethephon; Growth regulator evaluation; Mefluidide; Plant growth regulators; Trinexapac-ethyl
Abstract/Contents:"The frequency and severity of anthracnose epiphytotics, caused by the fungus Colletotrichum cereale, on golf course putting greens has increased over the past decade. Concurrently, plant growth regulation has become an integral component of putting green management, although their use has been suggested to encourage anthracnose. Mefluidide (ME) and ethephon (ET) are applied in the spring to suppress seedhead formation in annual bluegrass (ABG) putting green turf. Trinexapac-ethyl (TE) is applied throughout the growing season to improve playability by reducing vertical shoot growth and improving uniformity. More recently, TE has been increasingly used at rates and intervals exceeding label recommendations. Growth regulator effects on anthracnose development are currently unknown. The objectives of this study were to determine TE rate and interval effects on anthracnose, evaluate spring regulation influences on seedheads and disease, and to identify potential interactions between seedhead and vegetative regulation practices relative to anthracnose development. The study was conducted on an ABG putting green at the Horticultural Research Farm II in North Brunswick, NJ from 2005 through 2007. The area was mowed daily at 3.2-mm and nitrogen was applied at 4.9 kg ha-1 every 14-d. Treatments were arranged in a randomized complete block design with four replications. TE was applied at various rates (0.3-, 0.4-, and 0.6-L ha-1 ) and intervals (7-,14-d) April to September 2005, March to September 2006, and March to August 2007. ME (2.2-L ha-1) or ET (15.9-L ha-1) was applied twice in late-March and early-April each year both without and with TE (0.4-L ha-1 ) applied at two intervals (7- or 14-d) throughout the season. Com parisons of treatment effects were made by planned F-tests. TE did not affect anthracnose severity in the first year of study. However, TE reduced disease in 2006 at rates ranging from 0.3 0.6 L ha-1 applied every 7- or 14-d. Turf incurred 11 - 27% less anthracnose when treated with TE than untreated turf. More frequent application of TE (i.e., 7- vs. 14-d) reduced disease on 3- and 21-July 2006 at both 0.4- and 0.6-L ha-1. Anthracnose severity declined linearly with increasing rate of TE in 2006, but not in 2005 or 2007. There was no interaction between application interval and rate. Tolerance of ABG to low mowing heights may be enhanced due to the reduced shoot elongation of TE treated turf reducing stress associated with routine low mowing thus, reducing anthracnose. The average ME treatment effect reduced anthracnose 6 - 21% relative to untreated turf in 2005 and 2006, but had no effect in 2007. Whereas, ME-alone had 14 - 32% more disease compared to combinations of ME and TE over all three years. ME+TE reduced disease 5 - 11% in 2005 and 2006 compared to TE-alone, but were no different in 2007. The average ET treatm ent effect reduced anthracnose 13 - 35% relative to untreated turf in 2005 and 2006. ET+TE reduced disease 16 - 35% compared to ET-alone and 5 - 18% compared to TE-alone. Programs combining spring seedhead suppression with season-long vegetative regulation provided the most dramatic reduction of anthracnose."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Inguagiato, J. C., J. A. Murphy, and B. B. Clarke. 2008. Anthracnose disease management with plant growth regulators. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 62:p. 101.
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Web URL(s):
http://www.newss.org/proceedings/proceedings_2008.pdf#page=119
    Last checked: 07/16/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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