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| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=89 Last checked: 08/12/2013 Requires: PDF Reader Notes: Item is within a single large file |
| Publication Type: | Report |
| Author(s): | Breeden, S. M.; Farnsworth, D.; Brosnan, J.; Breeden, G. K. |
| Author Affiliation: | University of Tennessee, Knoxville, TN |
| Title: | Mowing height effects on preemergence herbicide efficacy for smooth crabgrass control |
| Section: | Posters Other records with the "Posters" Section |
| Meeting Info.: | Houston, Texas: January 28-30, 2013 |
| Source: | Proceedings of the Southern Weed Science Society: 66th Annual Meeting. Vol. 66, 2013, p. 2. |
| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
| # of Pages: | 1 |
| Keywords: | TIC Keywords: Crabgrass control; Cynodon dactylon; Digitaria ischaemum; Evaluations; Herbicide efficacy; Mowing height; Preemergence herbicides |
| Abstract/Contents: | "Smooth crabgrass (Digitaria ischaemum) is a problematic weed of warm- and cool-season turfgrass across the United States. While several preemergence (PRE) herbicides can effectively control smooth crabgrass, data describing the effects of mowing height on PRE herbicide efficacy are limited. Research was conducted in 2012 at the East Tennessee Research and Education Center (Knoxville, TN) investigating the effects of mowing height on PRE herbicide efficacy for smooth crabgrass control in common bermudagrass (Cynodon dactylon) turf. Treatments included the factorial combination of two mowing heights (15 and 50 mm), six PRE herbicides (indaziflam, dithiopyr, oxadiazon, pendimethalin, prodiamine, and prodiamine + sulfentrazone), and two application regimes (single, sequential). Both regimes delivered the same rate of active ingredient for each herbicide; however, sequential regimes split this rate across two applications spaced eight weeks apart. Total application rates were as follows: indaziflam (35 and 52.5 g ha-1), dithiopyr (560 g ha-1), oxadiazon (4500 g ha-1), pendimethalin (3360 g ha-1), prodiamine (1680 g ha-1), and prodiamine + sulfentrazone (1260 g ha-1). All treatments except oxadiazon were applied with a CO2 powered boom sprayer calibrated to deliver 281 L ha-1 utilizing four, flat-fan, 8002 nozzles at 124 kPa, configured to provide a 1.5-m spray swath. A granular formulation of oxadiazon was applied by hand with a shaker jar. All treatments were applied on 6 March 2012 with sequential applications made 30 April 2012. Irrigation was applied after treatment application. Plot size measured 1.5 x 3 m and treatments were arranged in a 2 x 6 x 2 factorial randomized complete block design with three replications. Weed control and turf injury were visually evaluated using a 0 (i.e., no weed control or turf injury) to 100 % (i.e., complete weed control or turf injury) scale at 2, 3, 4, 5, and 6 months after initial treatment (MAIT). Mowing height-by-application regime interactions were detected in smooth crabgrass control data 5 MAIT. Mowing height-by-herbicide interactions were also detected in smooth crabgrass control data collected 3, 4, and 5 MAIT as well. At the 15 mm mowing height, split application regimes provided greater smooth crabgrass control than single applications at 5 MAIT; however, no significant differences were detected between single and split application regimes at the 50 mm mowing height. By 5 MAIT, all herbicides except prodiamine provided greater smooth crabgrass control when applied to turf maintained at 50 mm compared to 15 mm. Data illustrate that mowing height can affect efficacy of PRE herbicides for smooth crabgrass control." |
| Language: | English |
| References: | 0 |
| See Also: | Original version appears in 67th Annual Meeting of the North Central Weed Science Society, Vol. 67 2012, p. 39, R=224645.R=224645 |
| Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-like – may be incomplete): | Breeden, S. M., D. Farnsworth, J. Brosnan, and G. K. Breeden. 2013. Mowing height effects on preemergence herbicide efficacy for smooth crabgrass control. South. Weed Sci. Soc. Proc. 66:p. 2. |
| Fastlink to access this record outside TGIF: | http://tic.msu.edu/tgif/flink/RECNO/227331 |
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| Web URL(s) : | http://www.swss.ws/wp-content/uploads/docs/2013 Proceedings-SWSS.pdf#page=89 Last checked: 08/12/2013 Requires: PDF Reader Notes: Item is within a single large file |
| MSU catalog number: | b2207931 |
| Find from within TIC: | Digitally in TIC by file name: swssp2013 |
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