Full TGIF Record # 169881
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Web URL(s):http://www.wsweedscience.org//wp-content/uploads/proceedings-archive/2010.pdf#page=21
    Last checked: 12/10/2013
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Wilen, Cheryl A.; Henry, J. Michael
Author Affiliation:Wilen: University of California Statewide IPM Program, San Diego; Henry: University of California Cooperative Extension, Riverside, CA
Title:Comparison of qualitative turf evaluations to quantitative methods for measuring weed pressure and turf quality
Meeting Info.:Albuquerque, NM: March 10-12, 2009
Source:Proceedings of the Western Society of Weed Science. Vol. 63, 2010, p. 11.
# of Pages:1
Publishing Information:Newark, CA: Western Society of Weed Science
Keywords:TIC Keywords: Competitive ability; Fertilization; Festuca arundinacea; Overseeding; Turfgrass quality; Weed control; Weed resistance
Abstract/Contents:"Long term weed control in turf depends on the competitive ability of the turf species and reducing vegetation gaps. Methods to improve the competitive ability of the turf and decrease the size and number of gaps would make the site less susceptible to weed invasion. From an integrated pest management standpoint, which stresses prevention of the pest, cultural practices such as proper fertilization to encourage a vigorously growing turf as well as overseeding to reduce gaps are better approaches than use of herbicides to restore the turf once invaded. We evaluated the effectiveness of overseeding and fertilizing on reducing the weed population in tall fescue turf plots and compared these treatments to commercial weed and feed products in 2006 and 2008. The goal was to fill in gaps (micro or macro) thereby reducing spaces where weeds could invade or establish. The qualitative evaluation of the plots was done by a visual rating generally based on the rating guidelines of the National Turfgrass Evaluation Program. The scale of 1 to 9 takes into account turf color, weediness, density, and ground cover with 1 being very poor and 9 being outstanding. A rating of 6 or above is generally considered acceptable. Weed cover was also rated qualitatively on a scale of 1-5 where 1=no weeds, 2=1-10% cover, 3=11-30% cover, 4=31-60% cover, 5=>60% weed cover. Quantitative measurements were done using a line transect to count weeds by species every 6" along 16' of the 24' plot, measuring turf color using a Turf Color Meter (TCM 500 from Spectrum Technologies), and measuring gaps (turf density) using high resolution digital photos of the turf and processing the images using SigmaScan software. Our results indicate that there is a correlation between turf density and weed ratings but that measurement of turf color did not reflect overall turf quality. [19]"
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wilen, C. A., and J. M. Henry. 2010. Comparison of qualitative turf evaluations to quantitative methods for measuring weed pressure and turf quality. Proc. West. Soc. Weed Sci. 63:p. 11.
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    Last checked: 12/10/2013
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