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| Publication Type:
| Report |
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| Author(s): | Simpkins, C. L.;
McCully, W. G.;
Meyer, R. E. |
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| Author Affiliation: | Texas Transportation Institute, College Station |
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| Title: | Post-emergence control of johnsongrass (Sorghum halepense [L.] Pers.) along highway pavements |
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| Meeting Info.: | Little Rock, AR; January 21-22, 1992 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 45, January 1992, p. 271-281. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 11 |
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| Keywords: | TIC Keywords: Roadside turf; Postemergence herbicides; Sorghum halepense; Glyphosate; Sulfometuron
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| Abstract/Contents: | "The purpose of this study was to develop alternatives for controlling johnsongrass (Sorghum halepense (L.) Pers.) and encourage replacement by shorter vegetation to facilitate high speed mowing along highways and to enhance roadside beauty. The difficulty in controlling johnsongrass around delineator and sign posts, culverts, and other fixtures adjacent to the highway pavement has necessitated more herbicide more herbicide testing. Johnsongrass is an aggressive and troublesome weed in the southern United States where it causes substantial yield losses in soybeans and cotton (5, 8, 9). The difficulty in controlling johnsongrass is due to its growth habits and the lack of completely effective herbicides (1). Glyphosate or glyphosate + sulfometuron is used widely in Texas for the control of johnsongrass by the Texas Department of Transportation program. The treatment of johnsongrass along roadsides should begin in the spring after bermudagrass has broken winter-dormancy and is actively growing and after wildflowers have set mature seed (6). Results indicate that mid-June applications of glyphosate provide excellent johnsongrass control in a no-till rotation of wheat-grain sorghum (4). Repeated applications of sethoxydim and other selective postemergence herbicides are often more effective than single applications for reducing johnsongrass populations (11). Imazapyr is effective when applied either pre- or postemergence at the labeled rate to johnsongrass (9). The efficacy of postemergence herbicides can be greatly affected by rainfall. Topgrowth control of johnsongrass with glyphosate was reduced with rainfall 20 to 240 minutes after treatment (2, 3). Glyphosate requires a longer rain-free period than other selective postemergence grass herbicides (10, 3)." |
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| Language: | English |
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| References: | 12 |
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| Note: | Figures
Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Simpkins, C. L., W. G. McCully, and R. E. Meyer. 1992. Post-emergence control of johnsongrass (Sorghum halepense [L.] Pers.) along highway pavements. South. Weed Sci. Soc. Proc. 45:p. 271-281. |
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MSU catalog number: SB 611 .S6 |
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