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| Web URL(s): | http://www.newss.org/proceedings/proceedings-2015.pdf#page=95
Last checked: 10/23/2015
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary Only |
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| Author(s): | McElroy, S.;
Flessner, M. L.;
Aldahir, P. F. |
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| Author Affiliation: | Auburn University, Auburn, AL |
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| Title: | Multi-year evaluation of preemergence herbicides |
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| Meeting Info.: | Williamsburg, Virginia: January 5-8, 2015 |
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| Source: | Proceedings of the Sixty-ninth Annual Meeting of the Northeastern Weed Science Society. Vol. 69, 2015, p. 93. |
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| Publishing Information: | College Park, Maryland: The University of Maryland |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Atrazine; Dimethenamid-P; Dithiopyr; Herbicide evaluation; Herbicide recommendations; Indaziflam; Oxadiazon; Pendimethalin; Poa annua control; Preemergence herbicides; Prodiamine; Seasonal maintenance; Seasonal variation; Simazine; Sulfentrazone; Weed control
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| Abstract/Contents: | "In data presentation, tables or bar charts are normally utilized to present the mean of a given treatment accompanied by mean separation procedures such as Fisher's Protected LSD. In such a comparison, researchers are able to statistically separate treatments based on the mean. While statistically sound, end-users are only given partial information in such a scenario to base their herbicide selection decisions. In turfgrass management, end-users are specifically interested in the consistency of products on a year after year basis, thus it is the treatment variability that is also of interest. Box-and-whisker plots, also referred to as box plots) are ideal for visualizing and comparing variability of treatments when trials are conducted over multiple years or locations. Research was initiated to evaluate preemergence weed control in turfgrass for four consecutive years with the goal of identifying possible yearly variability in treatments. A preemergence herbicide evaluation trial was initiated in Fall 2009 to evaluate annual bluegrass control and Spring 2010 to evaluate smooth crabgrass control. Each trial was repeated yearly in a different location until 2014, with trial initiation occurring in early March for preemergence smooth crabgrass control (four trials total) and mid-September for annual bluegrass control (four trials total). Treatments included (in kg ai/ha): atrazine (1.12), prodiamine (1.12), prodiamine (0.76) plus sulfentrazone (0.36) dithiopyr (0.56), pendimethalin (2.2), pendimethalin (2.2) plus dimethenamid-p (1.68), simazine (1.12), oxadiazon (3.36), indaziflam (0.027), indaziflam (0.054), and dimethenamid-p (1.68). Data were rated for percent weed control on a 0 to 100% scale monthly, however we present data from the conclusion of experiments which was early April for annual bluegrass trials and late-August for smooth crabgrass control trials. Treatments were applied with a CO2 pressurized backpack sprayer at 280 L ha-1. No adjuvants were included with any treatment. Data subjected to analysis of variance using PROC GLIMMIX using SAS 9.2 (SAS Institute, Cary NC). Box and whisker plots were generated using PROC BOXPLOT. First in evaluating annual bluegrass control, only prodiamine and indaziflam at 0.046 lower quartile range remained above 80% control. Quartile range of oxadiazon and indaziflam at 0.027 was 60 to 85% and 76 to 95%, respectively. For smooth crabgrass, only indaziflam (0.054) lower quartile exceeded 90%. Minimum lower quartiles for pendimethalin, pendimethalin plus dimethenamid-p, prodiamine plus sulfentrazone, dithyopyr, and prodiamine was 70% control or greater. Lower quartiles for atrazine, oxidiazon and indaziflam (0.027), failed to reach 60% control. Based on this results, prodiamine and indaziflam (0.054) can used to consistently and efficiently control annual bluegrass yearly. For smooth crabgrass, efficient and consistent control was only achieved with indaziflam (0.046), yet several herbicides resulted in moderate-to-high control." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McElroy, S., M. L. Flessner, and P. F. Aldahir. 2015. Multi-year evaluation of preemergence herbicides. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 69:p. 93. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings-2015.pdf#page=95
Last checked: 10/23/2015
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 |
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