Full TGIF Record # 86484
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Web URL(s):http://www.newss.org/proceedings/proceedings_2003_vol57.pdf#page=101
    Last checked: 07/23/2013
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Report
Author(s):Dernoeden, P. H.; Bigelow, C. A.; Kaminski, J. E.
Author Affiliation:University of Maryland, College Park, Maryland
Title:Preemergence herbicides for smooth crabgrass control generally performed poorly in Maryland in 2002
Section:Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
Meeting Info.:Hyatt Regency Hotel, Baltimore, MD: January 6-9, 2003
Source:Proceedings of the 57th Annual Meeting of the NortheasternWeed Science Society. Vol. 57, 2003, p. 101-102.
Publishing Information:Ithaca, NY: Northeastern Weed Science Society
# of Pages:2
Keywords:TIC Keywords: Crabgrass control; Digitaria ischaemum; Herbicide efficacy; Herbicide evaluation; Preemergence herbicides
Geographic Terms:Maryland
Abstract/Contents:"Experimental herbicides or new formulations of available preemergence products are continuously evaluated for smooth crabgrass (Digitaria ischaemum [Schreb] Schreb.ex Muhl) control performance. Two trials were conducted in 2002 in perennial ryegrass (Lolium perenne L.) turf mowed to a height of 2.5 inches. Herbicides were applied in 50 gpa using a CO2 pressurized (35 psi) sprayer equipped with an 8004E nozzle. Herbicides were applied 29 March and sequential treatments were applied on 22 May 2002. The sites were irrigated within 24 hrs of each herbicide application. Due to an extended period of drought the sites were irrigated frequently throughout the summer. Soil was a silt loam with a pH of 5.9 and 3.4% OM. Crabgrass seedlings were observed 10 April, but most germination occurred after mid-May. Plots were 5ft x 5ft and were arranged in a randomized complete block with 4 replications. Percent of plot area covered with smooth crabgrass was assessed visually on a 0 to 100% scale where 0 = no crabgrass and 100 = entire plot area covered with crabgrass. Smooth crabgrass pressure was uniform and severe across the sites. Treatments with crabgrass cover ratings below 10% were considered to have provided excellent control. Data were subjected to ANOVA and significantly different means were separated at P = 0.05. Mesotrione was applied in single and sequential applications in a preemergence timing and once in a postemergence timing (i.e., 22 May; crabgrass 1-3 leaf stage). Mesotrione was tank-mixed with X-77 non-ionic surfactant (NIS) at 0.25% v/v. Data collected 18 July showed that all Mesotrione treatments provided poor smooth crabgrass conrol (Table 1). By 16 Aug, only the 0.50 lb/A rate applied postemergence had reduced crabgrass levels significantly, when compared to the untreated control. Mesotrione applied postemergence or as sequentials (not single pre-timing treatments) elicited a brilliant chlorosis in the perennial ryegrass turf for about 7 to 10 days. Crabgrass plants treated postemergence with Mesotrione were bleached white, but plants generally recovered. Given the severe crabgrass pressure, all Barricade (prodiamine) treatments and Dimension (dithiopyr, 0.25+0.25 lb/A) were judged to have provided excellent crabgrass control. The second study compared two Pendulum (pendimethalin) formulations (3.3EC and 3.8CS) applied once at 2.0 lb/A or sequentially at 1.5 + 1.5 lb/A. Furthermore, several granular homeowners products were evaluated as follows: Scotts Turf Builder With Halts (pendimethalin, 1.5 lb/A); Sta-Green Premium Crab-Ex (dithiopyr, 0.252 lb/A); Vigoro Ultra Turf Pre (dithiopyr, 0.252 lb/A); Schultz Expert Gard. Prem. (prodiamine, 0.314 lb/A); Sam's Choice Crab. Prev. (prodiamine, 0.39 lb/A); Preen's Green Lawns (benefin + trifluralin, 3.03 lb/A); Lesco Dimension (dithiopyr, 0.155 lb/A); Scott's Super Turf Builder With Halts (pendimethalin, 1.5 lb/A); Scotts Step 1 Crab. Prev. (pendimethalin, 1.5 lb/A); Fert-i-lome Lawn Food + Weed Prev. (prodiamine 0.66 lb/A); and Dynaweed (corn gluten, 15 + 15 lb/prod./1000ft2). None of the granular homeowner products effectively controlled smooth crabgrass (data not shown). Among the granular products, best control was provided by Preen's Green Lawns (45% crabgrass cover) and Fert-i-lome Lawn Food (32% crabgrass cover). The Pendulum 3.8CS treatments provided better crabgrass control than their counterpart 3.3EC treatments. Given the exceptionally severe levels of crabgrass, only Pendulum 3.8CS (1.5+1.5 lb/A) was judged to have provided good control (13% crabgrass cover)."
Language:English
References:0
Note:Tables
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., C. A. Bigelow, and J. E. Kaminski. 2003. Preemergence herbicides for smooth crabgrass control generally performed poorly in Maryland in 2002. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 57:p. 101-102.
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Web URL(s):
http://www.newss.org/proceedings/proceedings_2003_vol57.pdf#page=101
    Last checked: 07/23/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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