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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Lowe, D. B.;
Whitwell, T. |
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| Author Affiliation: | Horticulture Department, Clemson University, Clemson, SC 29634 |
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| Title: | Paclobutrazol, flurprimidol and trinexapac-thyl influences the growth of selected turf weeds |
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| Section: | Papers and Abstracts Presented
Other records with the "Papers and Abstracts Presented" Section
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| Meeting Info.: | 49th Annual Meeting, Charlotte, NC, January 15-17, 1996 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 49, 1996, p. 73. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Greenhouse studies at Clemson University were used to determine the influences of plant growth regulators on selected turf weeds. The weed species were common bahiagrass (Paspalum notatum), purple nutsedge (Cyperus rotundus), goosegrass (Eleusine indica), and large crabgrass (Digitaria sanguinalis). Tifway II bermudagrass (Cynodon dactylon X transvaalensis Burtt-Davey) was included for comparison purposes. Bahiagrass and bermudagrass plugs were taken from turf areas in Florence, SC and then placed in 1 L pots. Norfolk sandy loam soil was also used as growing media for all species. Purple nutsedge plants and goosegrass plugs were taken from areas around Clemson, SC. Plant roots were washed before being potted. Crabgrass was seeded and each pot contained 20 seedlings. All plants were fertilized and irrigated as needed and were allowed 5 weeks of growth before treatments were applied. Treatments used in the study were trinexapac-ethyl @ 0.42 kg ai/ha, flurprimidol @ 1.1 kg ai/ha, and paclobutrazol @ 1.1 kg ai/ha, which represents the highest label rate for turf application. There were 4 repetitions of each treatment and the experimental design of the study was a randomized complete block. The measured parameters of the study were plant height and clipping dry weight. Plant height was measured 1 week after treatment (WAT), 2 WAT and 4 WAT. Plants were clipped at 25 mm above the soil surface at 1 WAT, 3 WAT and 5 WAT. Clippings were dried in a sample drying oven for two days and then weighed. Trinexapac-ethyl reduced the dry weight of bermudagrass by 88%, bahiagrass by 57%, goosegrass by 40%, and purple nutsedge by 16% throughout the 5 weeks of the study. Paclobutrazol reduced the dry weight of bermudagrass by 86%, bahiagrass by 43%, goosegrass by 40%, and purple nutsedge by 41%. Flurprimidol reduced the dry weight of bermudagrass by 82%, bahiagrass by 49%, goosegrass by 40%, and purple nutsedge by 43%. Crabgrass reacted differently to the treatments than the other plants. Trinexapac-ethyl and paclobutrazol increased crabgrass dry weight by 3% and 30% respectively; whereas, flurprimidol reduced crabgrass dry weight by 75%. Each PGR reduced the height of each species. Trinexapac-ethyl reduced the height of bermudagrass by 37%, bahiagrass by 21%, goosegrass by 6%, purple nutsedge by 7% and crabgrass by 27% throughout the 5 weeks of the study. Paclobutrazol reduced the height of bermudagrass by 35%, bahiagrass by 5%, goosegrass by 1%, purple nutsedge by 16% and crabgrass by 24%. Flurprimidol reduced the height of bermudagrass by 35%, bahiagrass by 12%, goosegrass by 6%, purple nutsedge by 10% and crabgrass by 35%. Trinexapac-ethyl and paclobutrazol increased crabgrass density in this study. Crabgrass density was measured visually as percent ground cover at 4 WAT. Crabgrass density was 79% and 83% with the use of trinexapac-ethyl and paclobutrazol respectively; whereas crabgrass density was 54% with the use of flurprimidol and the untreated was 48%." |
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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):
Lowe, D. B., and T. Whitwell. 1996. Paclobutrazol, flurprimidol and trinexapac-thyl influences the growth of selected turf weeds. South. Weed Sci. Soc. Proc. 49:p. 73. |
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