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Web URL(s):http://www.swss.ws/wp-content/uploads/docs/2010 Proceedings-SWSS.pdf#page=107
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Publication Type:
i
Report
Author(s):Cooper, T.; Henry, G. M.
Author Affiliation:Texas Tech University, Lubbock, TX
Title:Bermudagrass divot recovery in response to dinitroanaline preemergence herbicides
Section:Posters
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Meeting Info.:Little Rock, Arkansas: January 25-27, 2010
Source:2010 Proceedings, Southern Weed Science Society. Vol. 63, 2010, p. 57.
# of Pages:1
Publishing Information:Champaign, Illinois: Southern Weed Science Society
Keywords:TIC Keywords: Cultivar evaluation; Cynodon dactylon x Cynodon transvaalensis; Dinitroaniline herbicides; Dithiopyr; Divot recovery; Herbicide injury; Oryzalin; Pendimethalin; Preemergence weed control; Prodiamine
Cultivar Names:Tifway
Abstract/Contents:"Dinitroanaline herbicides are widely used for preemergence weed control due to long-term soil persistence, low mobility, and high efficacy on small-seeded weed species. However, use of these herbicides may have adverse rooting affects on desirable stoloniferous turfgrass species when applied improperly. Experiments were conducted at the Plant and Soil Science Greenhouse Complex in Lubbock, TX during the fall of 2009 to determine the recovery of simulated bermudagrass divot injury in response to dinitroanaline herbicides. One-year-old 'Tifway 419' bermudagrass sod was transplanted on 9/18/2009 into 15.2 cm pots filled with a Brownfield Sandy Clay Loam (loamy, mixed, superactive, thermic Arsenic Aridic Paleustalfs) and allowed to acclimate for six weeks prior to trial initiation to encourage rooting. Bermudagrass was mowed three times weekly with hand-held grass sheers to a height of 1.3 cm to simulate a golf course fairway. Plants were watered daily with an automated irrigation system. Fertilizer (16N-10.5P-9.9K) was applied at transplant at a rate of 24.4 kg N/ha and monthly thereafter for the duration of the trial. A 10.2 cm cup-cutter was used to remove a core from the center of each pot. Cores were replaced with the soil previously described. Herbicide treatments were applied using a CO2 backpack sprayer equipped with XR8004VS nozzle tips and calibrated to deliver 375 L/ha at 207 kPa. Herbicide treatments were applied on 10/30/2009 and consisted of oryzalin at 1.68 kg ai/ha, prodiamine at 1.05 kg ai/ha, pendimethalin at 2.5 kg ai/ha, and dithiopyr at 0.56 kg ai/ha. A non-treated check was included for comparison. The trial was arranged in a randomized complete block design with four replications of treatments. Digital photographs were taken at trial initiation and every two weeks throughout the duration of the trial (6 weeks) with a Nikon 10.0 megapixel camera mounted on a portable light box. Pictures were analyzed using WinCam 2007 software to determine % regrowth over bare soil. Data were subjected to analysis of variance (ANOVA) and means were separated using Fisher's Protected LSD at the 0.05 significance level. No bermudagrass regrowth was recorded for prodiamine, pendimethalin, and oryzalin treatments 2 WAIT. The non-treated check and dithiopyr treatments exhibited 8 and 3% regrowth, respectively, 2 WAIT. Prodiamine and oryzalin treatments still exhibited poor regrowth (3 and 0%, respectively) 6 WAIT. Pendimethalin, dithiopyr, and the non-treated check exhibited similar regrowth (15, 19, and 18%, respectively) 6 WAIT."
Language:English
References:0
Note:Reprint appears in Texas Tech University: Turfgrass Science Webpage, [2011], p. [1]
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cooper, T., and G. M. Henry. 2010. Bermudagrass divot recovery in response to dinitroanaline preemergence herbicides. South. Weed Sci. Soc. Proc. 63:p. 57.
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http://www.swss.ws/wp-content/uploads/docs/2010 Proceedings-SWSS.pdf#page=107
    Last checked: 08/01/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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