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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1985_vol39.pdf#page=267
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): | Sawyer, C. D.;
Wakefield, R. C. |
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| Author Affiliation: | Department of Plant Science, University of Rhode Island |
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| Title: | Spring growth period for effective application of growth retardants on turf |
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| Source: | Proceedings of the Annual Meeting of the Northeastern Weed Science Society. Vol. 39, 1985, p. 267. |
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| Publishing Information: | Ithaca, N. Y. : Northeastern Weed Science Society |
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| Keywords: | TIC Keywords: Growth retardants; Mefluidide; Maleic hydrazide; Amidochlor; Agrostis tenuis; Festuca rubra subsp. rubra; Lolium perenne; Height; Seedhead inhibition
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| Trade Names: | MH |
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| Geographic Terms: | Rhode Island |
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| Abstract/Contents: | Timely application of growth regulators is essential for adequate suppression of vegetative growth and seedheads in turfgrass. Personnel responsible for treating grasses along highway rights-of-way are particularly interested in knowing how many weeks they have to spray. In order to more clearly define the effective period of application in Rhode Island, three chemicals were applied to three stands of mixed turf species at weekly intervals from April 13 through May 9, 1984. Mefluidide (0.56 kg ai/ha), MH (4.48 kg ai/ha) and amidochlor (MON 4621; 2.8 kg ai/ha) were applied to in 700 1/ha water. Treatments were replicated four times in a randomized complete block design. Of the three turf stands treated, two were predominanatly composed of 'Exeter' colonial bentgrass and 'Pennlawn' red fescue, while the third was a mixture of 'Manhattan' perennial ryegrass and 'Pennlawn' red fescue. Red fescue and colonial bentgrass were largely dormant at the first treatment date while perennial ryegrass was measured periodically between May 11 and July 19. Half of each plot was clipped at 9 cm. six weeks after the last treatment. The remaining half was clipped ten weeks after the last treatment. Prior to the second clipping, seedheads were cut from 929 cm2 sample and counted by species. All treatments resulted in significant reduction in seedheads at all application dates at each location. Mefluidide provided the best control of red fescue seedheads with complete suppression in the ryegrass-fescue stand when applied April 10, 17, and 26. Most seedheads in amidochlor-treated plots were stunted. MH applied at the first two dates resulted in poor control of fescue and bentgrass seedheads. There were no differences between treatments in ryegrass seedhead suppression. Mefluidide and amidochlor resulted in good control of vegetative growth at all application dates. MH was less effective when applied at the two earliest dates (April 3 and April 10). Some turfgrass discoloration was observed with all growth regulators. The discoloration appeared to be caused by a combination of chemical injury, and leaf disease. |
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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):
Sawyer, C. D., and R. C. Wakefield. 1985. Spring growth period for effective application of growth retardants on turf. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 39:p. 267. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1985_vol39.pdf#page=267
Last checked: 07/25/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 |
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