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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Montgomery, D. P.;
Brede, A. D. |
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| Author Affiliation: | Dept. of Horticuilture and Landscape Architecture, Oklahoma State University, Stillwater, OK. |
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| Title: | Plant Growth Regulators on Bermudagrass Turf |
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| Meeting Info.: | Held: January 14-16, 1985, Houston, TX. |
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| Source: | Proceedings of the 38th Southern Weed Science Society. Vol. 38, 1985, p. 100. |
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| Publishing Information: | Southern Weed Science Society |
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| Keywords: | TIC Keywords: Growth regulators; Cynodon dactylon; Bromus tectorum; Lamium amplexicaule; Conyza canadensis; Sulfometuron; Flurprimidol; Application timing; Application rates
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| Abstract/Contents: | "A field investigation was conducted at the Oklahoma Turfgrass Research Center, Stillwater, OK, to determine the effectiveness of two plant growth regulators with relationship to the timing of application. All treatments were applied to U-3 bermudagrass at three applications dates: four weeks prior to bermudagrass green-up (March 15), the week of bermudagrass green-up (April 16), and four weeks after bermudagrass green-up (May 15). Treatments were arranged in a factorial design with three replications. Treatments were applied using a CO2 powered boom sprayer operating at 210 kPa and a 2801/ha carrier rate. Bermudagrass regrowth, turf discoloration, length of bermudagrass internodes on stolons, turf fresh weight, and weed density were evaluated over a five month period. Weeds present at the site were downy brome (Bromus tectorum), henbit (Lamium amplexicaule), and horseweed (Erigeron canadensis). There were not significant differences in stolon internode lengths among the treatments. Weed ratings at two dates (April 17 and May 17) showed that all chemical treatments significantly controlled weeds over an untreated check. At the first regrowth rating, sulfometuron methyl (0.14 kg/ha) plots had a significant reduction in regrowth over all flurprimidol plots and the untreated check. At the second regrowth rating, sulfometuron methyl (0.14 and 0.28 kg/ha) showed a significant reduction in regrowth over all other treatments. The March 15 and April 16 application dates also showed significantly less regrowth over plots treated on May 15. Sulfometuron methyl (0.14 and 0.28 kg/ha) plots were significantly discolored at both rating dates. The sulfometuron methyl (0.07 kg/ha) did show a significant amount of discoloration over the untreated check at the initial discolor rating, but this was not evident at the second rating. All chemical treatments resulted in reductions in harvest fresh weight when compared to an untreated check. Sulfometuron methyl (0.14 and 0.28 kg/ha) reduced harvest weights over all other treatments (sulfometuron methyl 0.07 kg/ha and flurprimidol .84 and 1.12 kg/ha). The treatment applied at green-up (April 16) has shown to signficantly reduce harvest weights over the post green-up (May 15) application." |
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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):
Montgomery, D. P., and A. D. Brede. 1985. Plant Growth Regulators on Bermudagrass Turf. Proc. Meet. South. Weed Sci. Soc. 38:p. 100. |
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MSU catalog number: SB 611 .S6 v.38 |
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