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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1990_vol44.pdf#page=114
Last checked: 07/25/2013
Requires: PDF Reader
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): | Dernoeden, P. H. |
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| Author Affiliation: | Department of Agronomy University of Maryland |
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| Title: | Safety and overseeding effects of chlorsulfuron in turfgrasses |
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| Meeting Info.: | Held: January 3,4,5, 1990; Boston MA |
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| Source: | Proceedings of the 44th Annual Meeting of the Northeastern Weed Science Society. Vol. 44, 1990, p. 114-115. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Festuca arundinacea; Lolium perenne; Poa pratensis; Cynodon dactylon; chlorsulfuron; germination; establishment; herbicide trials; Zoysia japonica
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| Abstract/Contents: | "These field studies were conducted to assess the influence of chlorsulfuron on the following parameters: (1) germination and establishment of overseeded tall fescue (Festuca arundinacea Shreb., TF), perennial ryegrass (Lolium perenne L., PRG) and Kentucky bluegrass (Poa pratensis L., KBG); (2) spring green-up of 'Meyer' zoysiagrass (Zoysia japonica Steud.) and 'Midiron' bermudagrass (Cynodon dactylon L.); and (3) tolerance of fall, 1988 seeded Kentucky bluegrass treated in spring, 1989. In all studies, plots were 5.0 by 5.0 ft. in size, and arranged in a randomized complete block with four replications. Data were subjected to analysis of variance and significantly different means were separated using the Bayes LSD at P = 0.05. Herbicides were applied in 50 gpa at 38 psi. Overseeing Study Chlorsulfuron was applied at 0.14 lb/A on 9 Aug 1988, and three turf species were disked seeded at conventional rates in separate plots 30 days (8 Sept) and 60 days (3 Oct) after treatment (DAT). Prior to disk seeding, the chlorsulfuron-treated KBG site was sprayed with glyphosate to kill the 7 year stand. The site was fertilized with 1.5 lb N/1000 ft2 from urea on 27 Oct 1988 and the area was kept moist throughout the germination period. Cover data for all three species disk seeded 30 DAT showed that chlorsulfuron, in general, had reduced establishment rate from 4 Oct to 15 Nov (Table 1). No statistical differences were observed in turf cover for chlorsulfuron and untreated plots among all species on 3 Dec, but cover ratings were lower where the herbicide was applied. Between 4 Oct and 3 Dec, plants of all three species disk seeded into chlorsulfuron-treated plots exhibited suppressed growth. It appeared that reduced cover was related more to foliar growth suppression than reduced seed germination. Chlorsulfuron, however, provided preemergence control of winter annuals. By May 1989, there were no differences in cover between chlorsulfuron and untreated plots. Similar results occurred 60 DAT. There was a trend for reduced TF cover; however, PRG cover was reduced significantly between 4 Nov and 22 Dec in chlorsulfuron-treated plots. Germination of KBG was slower than TF and PRG, and turfgrass cover was restricted more by low temperatures of late autumn than the herbicide. On 3 May 1989, cover data revealed that chlorsulfuron had no long-term effects on establishment as there were no differences in cover between herbicide-treated and untreated plots. Zoysiagrass and Bermudagrass Chlorsulfuron was applied 26 Apr 1989 to Meyer at 15% green-up and Midiron at 5% green-up. Both chlorsulfuron rates initially reduced spring green-up of Meyer [referred to in Table 2], but not Midiron (data not shown). By 25 May, all Meyer plots were at 98% green-up, but a severe chlorosis had developed in chlorsulfuron treated plots. Chlorosis, and therefore significantly reduced color ratings, persisted from 25 May to 20 June; by 6 July the chlorosis had dissipated. Chlorsulfuron, at the rates tested, caused no apparent injury to Midiron. Fall Seeded KBG Chlorsulfuron (0.09 and 0.19 lb/A), MON 15104 (0.25, 0.33, and 0.50 lb/A) and fenoxaprop (0.09, 0.18 and 0.25 lb/A) were applied 18 May 1989 to a KBG blend (Gnome + Merit + Columbia) seeded 9 Sept 1988. Bluegrass plants were in the 3 to 4 tiller stage on 18 May 1989. All rates of chlorsulfuron and MON 15104 were safe, causing no visual injury to the KBG. Fenoxaprop (0.09 lb/A) slightly reduced cover, but significantly reduced quality from 31 May to 5 July. Higher fenoxaprop rates, however, significantly reduced cover and overall quality throughout the data collection period, which was concluded 5 July 1989." |
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| Language: | English |
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| References: | 0 |
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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. 1990. Safety and overseeding effects of chlorsulfuron in turfgrasses. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 44:p. 114-115. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1990_vol44.pdf#page=114
Last checked: 07/25/2013
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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