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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2007.pdf#page=67
Last checked: 06/28/2013
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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): | Dernoeden, P. H.;
Fu, J. |
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| Author Affiliation: | Univ. of Maryland, College Park |
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| Title: | Autumn preemergence and spring postemergence control of mouseear chickweed and crabgrass 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.: | Baltimore, Maryland: January 2-5, 2007 |
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| Source: | Proceedings of the Sixty-First Annual Meeting of the Northeastern Weed Science Society. Vol. 61, 2007, p. 49-50. |
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| Publishing Information: | Baltimore, Maryland: Northeastern Weed Science Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Application timing; Cerastium glomeratum; Crabgrass control; Digitaria ischaemum; Festuca arundinacea; Herbicide efficacy; Herbicide evaluation; Postemergence weed control; Preemergence weed control; Veronica arvensis
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| Abstract/Contents: | "Mouseear chickweed (Cerastium vulgatum) and smooth crabgrass (Digitaria ischaemum) are common problematic weeds in Maryland lawns. Preemergence herbicides were evaluated for control of both weeds in tall fescue (Festuca arundinacea) and involved single herbicide applications on either 4 November 2005 or 31 March 2006. A postemergence trial also was conducted in April 2006 and targeted primarily mouseear chickweed, however, there was some corn speedwell (Veronica arvensis) evenly distributed throughout the study area. In both studies, plots were 5 ft by 5 ft and arranged in a randomized complete block with four replications. Weed cover was assessed visually on a 0 to 100% linear scale. Data were subjected to analysis of variance and significantly different means were separated using Fishers LSD at P <= 0.05. Soil was a Keyport silt loam with a pH of 5.7 to 6.0. Sprayable herbicides were applied in 50 GPA using a CO2 pressurized (35 psi) backpack sprayer. Granulars were applied by shaker bottle. In the preemergence study, mouseear chickweed was controlled effectively by sprayable formulations of prodiamine 65WG, dithiopyr 40WP and pendimethalin 3.8CS applied on 4 November (Table 1). Dithiopyr 0.21 G (0.5 lb ai/A) and prodiamine 0.25G (0.75 lb ai/A) applied 4 November appeared to reduce mouseear chickweed levels (4.0 to 4.8%) versus the untreated control (10%), but the difference was not significant. Treatments applied in the spring had little or no effect since mouseear chickweed had emerged prior to 31 March. Smooth crabgrass pressure was low and all treatments reduced crabgrass levels significantly when plots were evaluated 8 September 2006 (Table 1). Highly effective crabgrass control (<= 2% crabgrass cover) was provided by dithiopyr 0.21G (0.5 lb ai/A) and prodiamine 65WG (0.75 lb ai/A) applied 4 November 2005 and dithiopyr 0.21G (0.5 lb ai/A), prodiamine 0.20G (0.5 and 0.75 lb ai/A) and prodiamine 65WG (0.75 lb ai/A) applied 31 March 2006. There were few significant differences in the level of crabgrass control among herbicide treatments. In the postemergence broadleaf study, the following herbicides were applied 13 April 2006 to an immature stand of Kentucky bluegrass (Poa pratensis): quinclorac (0.75 lb ai/A + 1% MSO); 2.4-D + triclopyr (1.5 lb ai/A); triclopyr ester (1.0 lb ai/A); quinclorac + triclopyr ester (0.5 + 0.5 lb ai/A+1% MSO); and 2.4-D + MCPP + dicamba + carfentrazone (1.1 lb ai/A; Speedzone). Speedzone exhibited rapid and effective control of both corn speedwell and mouseear chickweed. All other treatments were ineffective. Corn speedwell and mouseear chickweed naturally declined and nearly all plants in untreated plots were dead by 22 May." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is as abstract and tables only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., and J. Fu. 2007. Autumn preemergence and spring postemergence control of mouseear chickweed and crabgrass in turf. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 61:p. 49-50. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2007.pdf#page=67
Last checked: 06/28/2013
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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