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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2001_vol55.pdf#page=105
Last checked: 07/24/2013
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Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Watschke, T. L.;
Borger, J. A. |
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| Author Affiliation: | Department of Agronomy, Penn State University, University Park, PA |
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| Title: | Postemergence crabgrass control in 2000 |
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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.: | Boston Marriott Cambridge, Cambridge, MA: January 2, 3, 4, and 5, 2001 |
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| Source: | Proceedings of the 55th Annual Meeting of the NortheasternWeed Science Society. Vol. 55, 2001, p. 105. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Postemergence weed control; Crabgrass control; Digitaria ischaemum; Lolium perenne; Granules; Application rates; Fenoxaprop-ethyl; Dithiopyr; Quinclorac
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| Abstract/Contents: | "Three studies were conducted on a mature stand of perennial ryegrass (Lolium perenne L.) at the Landscape Management Research Center, Penn State University, University Park, Pa. The objective of the studies was to evaluate the efficacy of postemergence herbicides for the postemergence control of smooth crabgrass (Digitaria ischaemum). All studies were a randomized complete block design with three replications. For the pre/post study, all of the treatments were applied on June 14, 2000, for the post study, all of the treatments were applied on July 2, 2000, and for the multiple timing study, treatments were applied on June 14, June 29, July 2, July 17, and Aug 1, 2000 using a three foot CO2 powered boom sprayer calibrated to deliver 40 gpa using two, flat fan, 6504 nozzles at 40 psi. Granular treatments were applied with a shaker jar. Evaluations of the pre/post study revealed that only Acclaim Extra (fenoxaprop-p-ethyl) at 0.12 lbs ai/A combined with pendimethalin at 1.5 lbs ai/A provided acceptable post emergence control of smooth crabgrass. The 40WP formulation of Dimension (dithiopyr) at 0.5 lbs ai/A and the 0.38 lb ai/A rate of XF00020 (dithiopyr) 2.65MEC approached commercial acceptance by providing 80% control. It appears that these two formulations of Dimension have potential to be satisfactory control products, at least at the highest rate for each. It is likely that a rate of 0.5 lbs ai/A of either XF00020 or XF00045 would provide acceptable control. For the post study, the addition of MacroSorb Foliar to the 0.5 lb ai/A rate of Drive (quinclorac) 75DF improved control from 68 to 78%. Drive 75DF alone at 0.75 lb ai/A provided 82% control which was close to being acceptable. There is little doubt that supplementing the 0.75 lb ai/A rate of Drive 75DF with MacroSorb Foliar would have easily increased control above the acceptable level. Acclaim Extra 0.57EW provided excellent control at 20 and 28 oz/A as did Ricestar (fenoxaprop-p-ethyl). Puma (fenoxaprop-p-ethyl) also provided excellent control at 11.4 and 16 oz/A. The addition of MacroSorb Foilar to a low rate of Acclaim Extra (10 and 15 oz/A) allowed for control that approached acceptability (83%). For the multiple timing study, only Drive 75DF applied once at 0.75 lbs ai/A failed to provide acceptable post emergence control of smooth crabgrass. Multiple applications (even using rates lower than 0.75 lbs ai/A) improved control of smooth crabgrass substantially. It appears, that by using multiple applications, the historical weakness in control using Drive at some growth stages, can be overcome." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Watschke, T. L., and J. A. Borger. 2001. Postemergence crabgrass control in 2000. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 55:p. 105. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2001_vol55.pdf#page=105
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 53 |
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