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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1984_vol38.pdf#page=305
Last checked: 07/29/2013
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Dernoeden, Peter H. |
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| Title: | Selective control of tall fescue in a Kentucky bluegrass turf with diclofop |
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| Source: | Proceedings of the Annual Meeting of the Northeastern Weed Science Society. Vol. 38, 1984, p. 310-311. |
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| Publishing Information: | Ithaca, N. Y. : Northeastern Weed Science Society |
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| Keywords: | TIC Keywords: Festuca arundinacea; Diclofop; Fenoxaprop-ethyl; Diclofop methyl
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| Abstract/Contents: | Tall fescue (Festuca arundinacea Schreb.) is an unsightly weed in Kentucky bluegrass turf. Spot applications of a non-selective herbicide is the only means of eliminating tall fescue from bluegrass turf. In this study, diclofop-methyl and fenoxaprop-ethyl (HOE-581) were evaluated for selective control of 'Kentucky 31' tall fescue in a stand of 'South Dakota Common' Kentucky bluegrass turf. Herbicides were applied on two ocassions: (a) April, 1982 when the stand was 7 months old (Table 1, Test I), and (b) July, 1982 when the stand was 10 months old (Test II, data not presented). Herbicides were applied in 280 L/ha of water in Test I at the rates and on the dates recorded in Table 1. Soil was a chillum silt loam with a pH of 7.1 and 1.6% organic matter. The statistical design in each test was a randomized complete block with four replications, and plot size was 1.5 by 3.0 m. The Test I site was irrigated twice in July and once in August, 1983; whereas, the Test II site received no supplemental irrigation in 1983. Both sites were not irrigated in 1982. A single, April application of diclofop, regardless of rate, reduced tall fescue populations significantly; whereas, fenoxaprop did not control tall fescue (Table 1). Diclofop at 4.5 kg/ha and fenoxaprop significantly reduced the density of the bluegrass. One year after the first application, tall fescue populations in treated plots had increased. This was attributed to recovery and new tiller production of injured tall fescue plants. Data collected Sept. 23, 1983 (i.e. after two applications) showed that 2.2 and 4.5 kg/ha diclofop had reduced tall fescue populations by 92 and 99%, respectively. data also revealed that diclofop-treated turf was not injured more than untreated turf by the severe heat and drought of the 1983 summer. When diclofop was applied in Test II in July 1982, no significant reduction in tall fescue populations were observed by April 1983 (data not presented). Data collected Sept. 23, 1983, however, (i.e. following an April, 1983 application) again showed that all rates of diclofop had significantly reduced tall fescue populations. Rates between 2.2 and 4.5 kg/ha of diclofop were most effective, providing 85 to 96% control. During a severe drought in late July 1983, foliage of diclofop-treated turf did not exhibit greater visual symptoms of drought stress than untreated turf. Although plots treated with 4.5 kg/ha diclofop appeared to be damaged more by the heat and drought in 1983, there was no significant reduction in bluegrass density among treated and untreated plots. In both tests, diclofop stunted growth of the bluegrass and caused some short-lived yellowing of the turf. Thinning of turf was most conspicuous at the 4.5 kg/ha rate of diclofop, and appeared within 2 weeks of application. |
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| Language: | English |
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| References: | Unknown |
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| Note: | Tables
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dernoeden, P. H. 1984. Selective control of tall fescue in a Kentucky bluegrass turf with diclofop. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 38:p. 310-311. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1984_vol38.pdf#page=305
Last checked: 07/29/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 |
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