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| Publication Type:
| Report |
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| Author(s): | Montgomery, D. P.;
Kenna, M. P.;
Cargill, L. M. |
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| Author Affiliation: | Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, Oklahoma |
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| Title: | Bermudagrass growth suppression using several herbicides |
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| Section: | Control of weeds on utility, railroad, and highway rights-of-way and on industrial sites
Other records with the "Control of weeds on utility, railroad, and highway rights-of-way and on industrial sites" Section
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| Meeting Info.: | Atlanta, Georgia: January 15-17, 1990 |
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| Source: | Proceedings: Southern Weed Science Society. Vol. 43, 1990, p. 295. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Several herbicides were evaluated in 1988 and 1989 for their ability to suppress bermudagrass growth in six field experiments located throughout Oklahoma. Similar treatments during 1988 and 1989 were uniconazole ((E)-1-(4-chlorophenyl)-4,4-dimethyl -2-(1,2,4-triazol-1-yl)-pent-1-en-3-ol) at 1.12 and 1.68 kg ha-1, clethodim ((E,E)-2-[1-[[(3-chloro-2-propenyl)oxy]imino]butyl]-5-[2- (ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one) at 0.06, 0.11 and 0.22 kg ha-1, cimectacarb (CGA-163935, (ethyl 4-cyclopropyl(hydroxy)methylene-3,5-dioxocyclohexanecarbox ylate) at 0.67, 0.90, and 1.12 kg ha-1, and sethoxydim (2-[1-(ethoxyamino)-butyl]-5-[2-(ethylthio)-propyl]-3-hydr oxy-2-cyclohexene-1-one) at 0.31 kg ha-1. In 1989 additional treatments of sethoxydim at 0.38 and 0.45 kg ha-1, and sethoxydim at 0.31 and 0.38 kg ha-1 combined with sulfometuron (2-[[[[(4,6-dimethyl-2-pyrimidinyl)amino]carbonyl]amino]su lfonyl]benzoic acid) at 0.05 kg ha-1 were evaluated. The experimental design was a randomized complete block replicated three times at each of the six locations. Treatments were applied to actively growing bermudagrass in late May or early June using a CO2-powered hand-held boom sprayer. Plots were mowed prior to treatment. Treatments were evaluated monthly for bermudagrass height, percent seedhead suppression, bermudagrass phytotoxicity, and total harvested dry matter. As expected, the relative performance of the herbicides tested varied slightly with the different soil types, climatic conditions, and other characteristics within the six locations as indicated by a significant location by treatment interaction. However, the overall climatic changes from year to year, primarily due to rainfall, played a more dramatic role in their performance. Analysis of bermudagrass heights indicated that all treatments were significantly reducing bermudagrass height at 1 month after treatment (MAT). Sethoxydim, cimectacarb, and the highest rate of clethodim reduced heights by more than 30%. The level of height reduction at 1 MAT was approximately the same during 1988 and 1989. At 2 MAT, these same treatments were significantly reducing heights with the cimectacarb reducing heights 41% (1988) to 51% (1989). The high rate of cimectacarb provided the best height reduction at the 3 MAT ratings. The reduction ranged from 43% (1988) to 63% (1989). High rates of clethodim, cimectacarb, sethoxydim, and sethoxydim + sulfometuron were reducing bermudagrass seedheads 95% or more at 1 MAT ratings and 80% or more at 2 MAT ratings. Seedhead suppression dropped off significantly by 3 MAT ratings. Treatments of clethodim, cimectacarb, sethoxydim, and sethoxydim + sulfometurn produced significant bermudagrass phytotoxicity for approximately 4 to 6 weeks. In 1988, high rates of uniconazole, clethodim, and all rates of cimectacarb reduced dry matter from 32 to 36% (1988). Dry matter reduction was greater in 1989 ranging from 38 to 75%." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Risk/benefit: A way of life"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Montgomery, D. P., M. P. Kenna, and L. M. Cargill. 1990. Bermudagrass growth suppression using several herbicides. South. Weed Sci. Soc. Proc. 43:p. 295. |
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