Full TGIF Record # 44659
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Web URL(s):http://www.newss.org/proceedings/proceedings_1998_vol52.pdf#page=68
    Last checked: 07/24/2013
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Author(s):Dernoeden, P. H.; Krouse, J. M.
Author Affiliation:Professor and research assistant; respectively, Department of Natural Resource Sciences and L. A., University of Maryland, College Park, MD 20742.
Title:Herbicides for smooth crabgrass control in Maryland for 1996 and 1997
Section:Turfgrass and plant growth regulators Wednesday-January 7, 1998
Other records with the "Turfgrass and plant growth regulators Wednesday-January 7, 1998" Section
Meeting Info.:Washington, DC: January 5-8, 1998
Source:Proceedings of the 52nd Annual Meeting of the Northeastern Weed Science Society. Vol. 52, 1998, p. 68-69.
Publishing Information:College Park, MD: Northeastern Weed Science Society
# of Pages:2
Keywords:TIC Keywords: Crabgrass control; Digitaria ischaemum; Herbicide efficacy; Herbicide evaluation; Lolium perenne; Poa pratensis
Geographic Terms:Maryland
Abstract/Contents:"Six studies were conducted in 1996 and 1997 to assess herbicides for pre- and postemergence smooth crabgrass (Digitaria ischaemum [Schreber] Schreber ex Muhlenb.) control. Two PRE and one POST studies were conducted in each year. In 1996, the PRE studies were conducted in Kentucky bluegrass (Poa pratensis L., KBG) grown on a Chillum silt loam with a pH of 5.9 and 2.3% OM. All other studies were conducted in perennial ryegrass (Lolium perenne L., PRG) grown on a Sassafras sandy loam with a pH of 6.3 and 1.7% OM. All PRE herbicides were applied between 8 and 12 April, and sequentials were made on 28 or 29 May. All sites were irrigated within 24 h of each herbicide application. Granulars were applied by shaker bottle and sprayables with a CO₂-pressurized (35 psi) sprayer calibrated to deliver 50 gpa. Plots were 5 by 5 ft and were arranged in a randomized complete block with four replicates. Percent of plot area covered with crabgrass was assessed visually on a 0 to 100% scale where 0= no crabgrass and 100= entire plot area covered. Data were subjected to analysis of variance and significantly different means were seperated by Duncan's multiple range test (P=0.05). Studies I and II were conducted in KBG, where crabgrass pressure was extremely severe. In Study I, outstanding control (i.e., ≤5% crabgrass cover) was provided by Dimension 1EC (0.25 + 0.25 lb ai/A = lb/A), and Dimension 0.34G (0.38 lb ai/A). Relatively good control (i.e., 6-15% crabgrass) was given by Dimension 0.25G (0.38 lb ai/A), Barricade 65WDG (0.65, 0.75, and 0.5+0.25 lb/A), and Pendulum 60WG (1.5+1.5 lb/A). Treatments with objectionable crabgrass levels (i.e., >18% cover) included: Team 0.87G (1.5 + 1.5 lb/A), pendimethalin 0.86G (1.5 + 1.5 lb/A), Dimension 0.164G and 0.172G (0.25 lb/A), Dimension 1EC (0.38 and 0.50 lb/A), Barricade 65WDG (0.48 lb/A), Barricade 0.22G (0.50 lb/A), Pendulum (3.0 lb/A), and Ronstar 2G (4.0 and 2.0 + 2.0 lb/A). In Study II, good control was provided by Barricade (0.38 + 0.19; 0.38 + 0.38; 0.50 + 0.25; 0.50 + 0.50; and 0.65 + 0.325 lb/A), and Pendulum (1.5 + 1.5 lb/A). Poor control (>16% cover) was provided by Barricade (0.25 + 0.25; 0.50; and 0.75 lb/A), and Pendulum (3.0 lb/A). Studies III and IV (Table 1) were conducted in PRG in 1997, where crabgrass pressure was moderately severe. In Study III, Barricade 65WG (0.75; 0.5 + 0.25; and 0.38 + 0.38 lb/A) and Dimension 1EC (0.38 lb/A) provided outstanding control (ie., < 5% crabgrass cover). Ronstar (2.0 lb/A) provided poor crabgrass control. In Study IV, poor control occurred in plots treated with Dimension 1 EC 0.25 lb/A), and Pendulum (1.54 lb/A) (Table 1). All other treatments provided similar control. There was a POST study in both 1996 (data not shown) and 1997 (Table 1). In both years, Acclaim Extra (0.06 lb/A) applied in June when crabgrass was in the 1-4 leaf stage resulted in unacceptable control. Dimension applied at 0.50 lb/A in mid-June (1-4 leaf) or early July (1-2 tiller) provided excellent season-long crabgrass control. PreClaim applied at 2.0 lb/A to crabgrass in 1-4 leaf stage in 1996 provided excellent control, however, in 1997 the 1.54 and 2.06 lb/A rates of PreClaim applied in June prior to tillering did not provide acceptable crabgrass control. PreClaim (3.0 lb/A in 1996, and 2.06 and 3.09 lb/A in 1997) and Acclaim Extra (0.09 lb/A in both years) applied to tillered crabgrass in early July provided excellent control."
Language:English
References:0
Note:Table
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., and J. M. Krouse. 1998. Herbicides for smooth crabgrass control in Maryland for 1996 and 1997. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 52:p. 68-69.
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http://www.newss.org/proceedings/proceedings_1998_vol52.pdf#page=68
    Last checked: 07/24/2013
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    Notes: Item is within a single large file
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