Full TGIF Record # 310344
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/121579
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Weaver, Joshua; McCarty, Lambert B.; Quisenberry, Virgil L.; Hubbard, Lewis Ray; Bridges, William C.
Author Affiliation:Weaver, Quisenberry, and Hubbard: Clemson University, Pendleton, SC; McCarty: Department of Plant and Environmental Sciences, Clemson University, Clemson, SC; Bridges: Mathematical Sciences, Clemson University, Clemson, SC
Title:Evaluating biological thatch control on golf greens
Section:C05 turfgrass science
Other records with the "C05 turfgrass science" Section

Golf turf management oral 1: Cultural practices, physiology, and water (includes student competition)
Other records with the "Golf turf management oral 1: Cultural practices, physiology, and water (includes student competition)" Section
Meeting Info.:San Antonio, Texas: November 10-13, 2019
Source:ASA, CSSA and SSSA International Annual Meetings. 2019, p. 121579.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Keywords:TIC Keywords: Biological control; Biostimulants; Golf green maintenance; Molasses; Normalized Difference Vegetation Index; Root weight; Sand topdressings; Surface hardness; Thatch control; Turfgrass quality; Zoysia matrella
Cultivar Names:Diamond
Trade Names:Earth Max; Worm Power
Abstract/Contents:"Thatch is a layer of living and dead plant material (stems and roots) between turfgrass leaf tissue and the soil surface (McCarty, 2018). Excessive thatch and other organic material can cause decreased playability of turf surfaces, mower scalping, increased disease pressure, reduced pesticide efficacy, harbor insects, and poor water infiltration (McCarty et al., 2016). An excessive thatch layer can also be a haven for insect pests. In a golf greens, mechanical practices such as vertical mowing, core cultivation, grooming, and topdressing are used for managing thatch/OM. Of the aforementioned practices, vertical mowing and core cultivation are more disruptive to the playing surface than grooming or topdressing (McCarty et al., 2007). Previous studies have been conducted to investigate biological thatch control options that would minimize thatch in turfgrass. Most biological products contain an array of sucrose, glucose, or other sugar sources, low nutrient content, various acids, and inoculated microorganisms (McCarty et al., 2007). Biostimulants are defined by Schmidt et al. (2003) as organic materials that, when applied in small quantities, enhance plant growth and development. Our study consisted of two 16-week greenhouse studies at Clemson University, to evaluate the two biostimulant products, Worm Power and Earth MAX, and their impact on thatch and rooting depth. In addition to the biostimulants, two industry standards were included: blackstap molasses and sand topdressing. Plugs were extracted from a Diamond zoysiagrass (Zoysia matrella) nursery golf green at Clemson University. Turf plugs were placed in pots in the greenhouse with an 85 sand:15 peat moss rootzone as per USGA putting green specification. Treatment rates were: Worm Power at 16 oz 1,000 ft2; Earth Max at two rates, 1 gal ac-1 applied every two weeks, or 2 gal ac-1 applied monthly; black strap molasses at 5.25 oz 1,000 ft2 applied weekly; sand topdressing at 0.6 mm depth twice monthly; and, an untreated control. In addition to the greenhouse studies, two 16-week summer field studies were conducted on the Diamond zoysiagrass nursery green located at the Walker Course at Clemson University. The nursery green was maintained to golf course standards and treatments listed above were applied. Turf quality, NDVI, surface firmness (Clegg Impact), root mass and thatch ratings were taken as well. All treatments provided greater rooting length and root mass than the untreated, however, a significant decrease in thatch in treatments was undetectable compared to the control. Future research could include determining if biostimulants alone are encouraging root growth or is a fertilizer or organic acid component providing this."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Weaver, J., L. B. McCarty, V. L. Quisenberry, L. R. Hubbard, and W. C. Bridges. 2019. Evaluating biological thatch control on golf greens. Agron. Abr. p. 121579.
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