Full TGIF Record # 42239
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Web URL(s):http://www.newss.org/proceedings/proceedings_1997_vol51.pdf#page=50
    Last checked: 07/24/2013
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Publication Type:
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Report
Content Type:Abstract or Summary only
Author(s):Watschke, Thomas L.; Borger, Jeffrey A.
Author Affiliation:Professor and Research Assistant, Department of Agronomy, Penn State University
Title:Seedhead suppression of annual bluegrass and tall fescue
Meeting Info.:Newport, RI; January 6-9, 1997
Source:Proceedings of the 51st Annual Meeting of the Northeastern Weed Science Society. Vol. 51, 1997, p. 50.
Publishing Information:College Park, MD: Northeastern Weed Science Society
# of Pages:1
Keywords:TIC Keywords: Festuca arundinacea; Growth regulator evaluation; Mefluidide; Phytotoxicity; Poa annua; Seedhead inhibition
Abstract/Contents:"Two studies were conducted to assess seedhead suppression in 1996. One study was conducted on a mixed stand of creeping bentgrass and Poa annua on the practice green at the Penn State Blue Golf Course in State College, PA. The study was a randomized completed block design with three replications. All of the treatments were applied on April 22, 1996, using a three foot CO₂ powered boom sprayer calibrated to deliver 80 gpa using two 6504 nozzles at 30 psi. The weather conditions at the time of application were sunny with a slight wind (less than 5 mph) and an air temperature of 80 F and a soil temperature of 60 F at two inches. The green was maintained using normal practices for irrigation, mowing, and fertilizer. Seedhead suppression was rated on two dates (5/10/96 and 5/17/96). On May 10, mefluidide Lite provided excellent seedhead suppression (90%). Mefluidide provided 80% suppression, but both products had reduced suppression when supplemented with Ferromec (15-0-0). Even though Ferromec reduced the suppression of mefluidide Lite, there was suppression comparable to mefluidide. Ferromec significantly safened the discoloration that resulted from the mefluidide Lite application. All treated turf had significantly better quality on the May 17 rating date than nontreated turf. This differnce was primarily associated with the reduction in quality of the nontreated turf as the result of the presence of seedheads. Mefluidide Lite reduced seedheads significantly more that mefluidide on the May 10 rating date even though the rate of active ingredient applied from both sources was identical. The second study was conducted at the Landscape Management Research Center, University Park, PA, on a predominately tall fescue turf. The treatments were applied on May 3, 1996 (seedheads not emerged), using a three foot hand held CO₂ powered boom sprayer with two flat fan 6504 nozzles calibrated to deliver 80 gpa. Ratings were taken on a weekly basis for vegetative turf height (excluding the seedheads) and seedhead suppression was rated five weeks after treatment (June 10). Phytotoxicity ratings were taken 19 days after treatment and again near the the conclusion of the study as some treatments had not fully recovered. On May 22 and June 10, none of the treated turf was rated below 7 (considered acceptable) for phytotoxicity, although there were differences among the treatments with respect to the phytotoxicity they caused (treatments that included SAN1269H caused more phytotoxicity that the others). Seedhead suppression rated on June 10 was considered acceptable on turf treated with EH1094 at the two highest rates, EH1135 at the two highest rates, mefluidide at 0.2 oz/M and mefluidide plus Event (imazaquin and imazethapyr) at 0.2 oz/M and 0.5 oz/M, respectively."
Language:English
References:0
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Watschke, T. L., and J. A. Borger. 1997. Seedhead suppression of annual bluegrass and tall fescue. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 51:p. 50.
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http://www.newss.org/proceedings/proceedings_1997_vol51.pdf#page=50
    Last checked: 07/24/2013
    Requires: PDF Reader
    Notes: Item is within a single large file
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