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| Web URL(s): | http://newss.org/proceedings/proceedings_2009.pdf#page=96
Last checked: 07/17/2013
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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.;
Pigati, R. L. |
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| Author Affiliation: | University of Maryland, College Park |
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| Title: | Pre and postemergence crabgrass control in turf using various herbicide timings |
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| Section: | Turfgrass and plant grown regulators
Other records with the "Turfgrass and plant grown regulators" Section
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| Meeting Info.: | Baltimore, Maryland: January 6-8, 2009 |
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| Source: | Proceedings of the Sixty-Third Annual Meeting of the Northeastern Weed Science Society. Vol. 63, 2009, p. 81-82. |
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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; Digitaria ischaemum; Dithiopyr; Festuca arundinacea; Granular herbicides; Herbicide evaluation; Mesotrione; Pendimethalin; Prodiamine; Quinclorac
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| Abstract/Contents: | "Two field studies were conducted in 2008 to control smooth crabgrass (Digitaria ischaemum) in tall fescue (Festuca arundinacea) turf. In Study I, single and sequential herbicide applications in a preemergence (pre) and three postemergence (post) timings were assessed. Rates and dates of herbicide applications appear Table 1. Study II was a post study in which three rates of mesotrione in three timings and one rate of three sources of quinclorac in two timings were compared to fenoxaprop. Mesotrione and quinclorac were tank-mixed with 0.25% nonionic surfactant (NIS) and 1% methylated seed oil (MSO), respectively. The turf was mowed to a height of 2.5 inches two times weekly and the site was irrigated as needed. Soil was a Keyport silt loam with a pH of 5.7 and 3.4% OM. Plots were 5 ft x 5 ft and arranged in a randomized complete block with four replications. Sprayable herbicides were applied in 50 GPA using a CO2 pressurized sprayer equipped with an 8004E flan-fan nozzle. Granular herbicides were applied with a shaker jar. Smooth crabgrass pressure was uniform and severe across the site. Crabgrass cover was rated on a visual linear 0 to 100% scale where 0 = no crabgrass present and 100 = entire plot area covered with crabgrass. Data were subjected to analysis of variance and significantly different means were separated using Fisher's protected least significant difference at P <= 0.05. Only data from the final observation date (i.e., 22 Aug.) are discussed. In Study I, two formulations of prodiamine were evaluated. Prodiamine 4F was applied alone or tank-mixed with mesotrione in various timings (Table 1). Prodiamine 4F applied once at 0.75 lb/A provided poor control; whereas, prodiamine 65 DG applied once at 0.75 lb/A provided 91% control. Prodiamine 4F applied at 0.38 + 0.38 lb/A provided outstanding crabgrass control (94%). Prodiamine 4F applied alone or mixed with prodiamine 4F + mesotrione on 8 April followed by prodiamine 4F + mesotrione on 29 May also provided outstanding control. Pendimethalin applied sequentially (2.0+1.5 lb/A) provided excellent pre control (94%). Prodiamine + sulfentrazone (both formulations) applied once pre provided poor crabgrass control. Dithiopyr applied pre was ineffective. Both prodiamine + sulfentrazone formulations provided excellent (92 to 94% control) early post and subsequent pre control in the 1-2 tiller timing. Dithiopyr (0.5 lb/A) applied in the 1- 4 L timing failed to reduce crabgrass, but in the 1-2 tiller timing reduced crabgrass 80%. All treatments applied in the 2 to 3 tiller timing were ineffective. In Study II, there were five post mesotrione treatments applied at three rates either 2, 3 or 6 weeks apart. Mesotrione applied three times (16 June and 7 and 28 July) at 0.156 lb/A or twice at 0.25 lb/A (16 June + 7 July or 16 June + 28 July) provided an equivalent level of control (94 to 99%). Mesotrione applied twice at 0.184 lb/A on either 16 June and 7 July or 14 July and 28 July provided equivalent control (94-99%). Data showed that mesotrione has a wide window of post activity against crabgrass. Three sources of quinclorac were assessed (XLR8; generic; commercial) at 0.75 lb/A at mid-June (4-leaf to 1 tiller crabgrass) and mid-July (4-leaf to 2 tiller) timings. At mid-June, commercial and generic quinclorac provided a similar level of post crabgrass 82 control (85-90%), which was superior to XLR8 (9%). In the mid-July timing, all quinclorac sources provided equivalent control (93-96% control). Fenoxaprop provided fair (83%) and excellent (98%) control in the mid-June and mid-July timings, respectively. All quinclorac sources and fenoxaprop provided effective crabgrass control when applied once in mid-July." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract and table only!
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H., and R. L. Pigati. 2009. Pre and postemergence crabgrass control in turf using various herbicide timings. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 63:p. 81-82. |
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| Web URL(s):
http://newss.org/proceedings/proceedings_2009.pdf#page=96
Last checked: 07/17/2013
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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