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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2005.pdf#page=111
Last checked: 07/22/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Demoeden, P. H.;
McDonald, S. J. |
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| Author Affiliation: | University of Maryland, College Park, MD |
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| Title: | Maryland 2004 smooth crabgrass control studies in turf |
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| Section: | Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
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| Meeting Info.: | Capital Hilton, Washington, D.C.: January 3-6, 2005 |
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| Source: | Proceedings: NortheasternWeed Science Society. Vol. 59, 2005, p. 97-98. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Digitaria ischaemum; Crabgrass control; Herbicide evaluation; Preemergence weed control; Mesotrione; Prodiamine; Preemergence herbicides; Postemergence herbicides; Lolium perenne; Application timing; Cover; Herbicide combinations
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| Trade Names: | Barricade |
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| Abstract/Contents: | "Two field studies were conducted to evaluate herbicides for smooth crabgrass (Digitaria ischaemum) control as follows: 1) a standard preemergence study; and 2) a pre- and early postemergence study involving mesotrione and Barricade (prodiamine) tank-mixes. Both studies were conducted in a perennial ryegrass (Lolium perenne) turf in College Park, and turf was mowed to a height of 2.5 inches. Soil was a Keyport slit loam with a pH of 5.9 and 3.4% OM. For the peremergence study, herbicides were applied initially on 25 March and sequentials were applied 7 May 2004. Mesotrione and Barricade treatments were mixed with a non-ionic surfactant (NIS) and applied at various timings as noted in the data table. Crabgrass seedlings first were observed on 16 April, but most germination occurred after mid-May. Crabgrass pressure was severe and uniform. Sprayable herbicides were applied in 50 GPA using a CO2 pressurized (35 psi) backpack sprayer. Granulars were applied by shaker bottle. Study sites were irrigated within 48 hrs of each herbicide application. In both studies, plots were 5 ft by 5 ft and were arranged in a randomized complete block with four replications. Percent of plot area covered by smooth crabgrass was assessed visually on a 0 to 100% linear scale on 9 July and 17 August 2004. Treatments with a rating of 9% plot area covered by crabgrass were subjectively considered to have provided excellent control. Data were subjected to ANOVA and significantly different means were separated by Turkey's protected least significant difference test at P 0.05. Two pendulum (pendimethalin) formulations were evaluated for preemergence crabgrass control as follows: Pendulum 3.3EC at 2.0 + 1.5 and 1.5 + 1.5 lb ai/A; and Pendulum 3.8CS at 2.0 + 1.5, 1.5 + 1.5, and 1.5 + 2.0 lb ai/A. Among Pendulum treatments, only Pendulum 3.8CS (1.5 + 1.5 lb/A) was judged to have provided excellent (9% cover), season-long crabgrass control (data not shown). There were, however, no significant crabgrass cover (9 to 26%) differences among Pendulum treatments. Dimension 40WP (dithiopyr, 0.5 and 0.25 + 0.25 lb ai/A), Team Pro 0.86G (benefin + trifluralin, 1.5 + 1.5 lb ai/A), and Team Pro 0.86G + Dimension 40WP (1.5 + 0.25 lb ai/A) also provided excellent crabgrass control (5 to 9% cover). Two Barricade formulations were evaluated: Barricade 4F and 65WG at 0.75 and 0.5 + 0.25 lb ai/A. Crabgrass levels in all Barricade-treated plots were commercially unacceptable, although crabgrass levels in Barricade-treated plots (22 to 46% crabgrass cover) did not differ significantly from treatments providing excellent control. There was a non-significant trend suggesting that the 65WG formulation provided better crabgrass control than the 4F formulation. Uncharacteristically, there were no large differences between single and split applications of Barricade. Field notes states that mesotrione + Barricade elicited a yellowing and stunting of the perennial ryegrass for about three weeks following the application of the preemergence treatment. Plots treated 25 March with mesotrione + Barricade exhibited reduced quality on 11 May, but no reductions in quality were observed among the "Early Post" treatments thereafter (data not shown). Injury, however, was noted on 10 June immediately following the postemergence application of sequential treatments on 9 June. The ryegrass injury took the form of a chlorosis, which dissipated rapidly. Smooth crabgrass cover was rated 9 July and 17 August, but only 17 August data are discussed. Barricade and mesotrione + Barricade applied preemergence significantly reduced crabgrass populations, when compared only to the untreated control (Table 1). Plots receiving the aforementioned preemergence treatments, however, had commercially unacceptable levels of crabgrass (44 to 60% cover). Barricade applied alone and early postemergence had reduced crabgrass levels more effectively than mesotrione + Barricade applied preemergence, but was not significantly different from Barricade alone. Hence, data indicate that Barricade has early postemergence activity on smooth crabgrass. Fair crabgrass control (14 to 19% cover) was provided by mersotrione + Barricade applied once in the early postemergence timing (Early post). Dimension, the standard for early postemergence crabgrass conrtrol in this study, provided excellent control when applied early postemergence. Mesotrione + Barricade Early post + sequential (both rates) and Barricade Early post + mesotrione + Barricade + sequential treatment (i.e., 9 June) provided equal and excellent season-long smooth crabgrass control." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is as abstracts and tables only |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Demoeden, and S. J. McDonald. 2005. Maryland 2004 smooth crabgrass control studies in turf. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 59:p. 97-98. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2005.pdf#page=111
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 57 |
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