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| Publication Type:
| Report |
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| Author(s): | McCarty, L. B.;
Colvin, D. L.;
Porter, D. W. |
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| Author Affiliation: | McCarty: Department of Ornamental Horticulture; Colvin and Porter: Department of Agronomy, University of Florida, Gainesville, FL |
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| Title: | Carpetgrass response to selected postemergence herbicides |
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| Section: | Weed control in turf, pasture, and rangeland
Other records with the "Weed control in turf, pasture, and rangeland" 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. 160. |
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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: | "Carpetgrass (Axonopus affinis) is a perennial warm-season grass adapted to sandy or sandy loam soils with the ability to withstand soils containing a relatively high moisture content. Carpetgrass is used selectively in homelawns, pastures and in other situations which require low maintenance. Research conducted at the University of Florida was done to examine the use of several postemergence herbicides on carpetgrass, at rates labeled for use on other warm-season turfgrasses. Phytotoxicity, injury response of the turfgrass was measured visually at intervals 2, 3 and 6 weeks after treatment (WAT). Over the duration of the experiment no significant damage occurred, when compared to the untreated check following mecoprop (1.12 kg ai/ha), dicamba (0.56 kg ai/ha), or bentazaon (2.24 kg ai/ha) treatments. Atrazine (2.24 kg ai/ha) and imazaquin (0.42 and 0.56 kg ai/ha) treated plots showed slight damage at 2 WAT, but recovered to a point similar to the untreated checks by 3 WAT. Initial phytotoxic injury following 2,4-D (1.12 kg ai/ha), 2,4-D + dicamba (0.84 + 0.28 kg ai/ha), 2,4-D + triclopyr (1.12 + 0.56 kg ai/ha), 2,4-D + MCPA + dicamba (1.03 + 0.55 + 0.12 kg ai/ha), triclopyr (0.56 kg ai/ha), sulfometuron (0.17 kg ai/ha), and diclofop (2.24 kg ai/ha) treatments was evident but was also acceptable. These plots generally improved but did not equal the untreated check during the experiment. While initial injury to the carpetgrass was noted in the metsulfuron (0.17 kg ai/ha), and sethoxydim (0.28 and 0.56 kg ai/ha) plots, by 6 WAT the treated areas had recovered. Plant phytotoxicity levels for MSMA (1.12 and 2.24 kg ai/ha) and asulam (2.24 kg ai/ha) were unacceptable throughout the duration of the experiment. Carpetgrass response to imazaquin and bentazon, herbicides commonly used to control sedges was favorable in all cases and not significantly different from the check plots by 6 WAT. Response of the carpetgrass to herbicides which are commonly used to control broadleaf weeds (e.g. 2,4-D, dicamba, MCPA and/or triclopyr) varied from no significant injury to those which resulted in modest levels of injury through 6 WAT. Whereas, herbicides commonly used to control grass type weeds (e.g. MSMA, asulam, sethoxydim) caused significant damage initially to the carpetgrass. Reaction of the carpetgrass on the 3 and 6 WAT ratings to the postemergence grass herbicides varied. Carpetgrass had recovered from the sethoxydim treatments by 3 WAT to acceptable levels, while MSMA and asulam treated plots did not." |
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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):
McCarty, L. B., D. L. Colvin, and D. W. Porter. 1990. Carpetgrass response to selected postemergence herbicides. South. Weed Sci. Soc. Proc. 43:p. 160. |
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