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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.;
Cargill, L. M.;
Martin, D. L. |
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| Author Affiliation: | Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, OK |
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| Title: | The history and future use of atrazine along Oklahoma's state highway system |
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| Meeting Info.: | Charlotte, NC: January 18-20, 1993 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 46, 1993, p. 230. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Atrazine; Roadside turf; Weed control
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| Geographic Terms: | Oklahoma |
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| Abstract/Contents: | "The first use of atrazine for roadside weed control in Oklahoma began in research trials in the mid 1960's. The research was a cooperative effort between the Oklahoma Department of Transportation (ODOT) and Oklahoma State University (OSU). Atrazine along with numerous other herbicides were tested for their ability to selectively control annual broadleaf and grassy weeds in bermudagrass and native roadsides. Even though atrazine was economical and performed well in research studies it was not until 1980 before it was implemented into widescale use along the state highway system. Atrazine was the first selective preemergent herbicide used to any extent on Oklahoma roadsides. For the first time, state transportation personnel were controlling weeds such as cheat, downy brome, hairy vetch, and sweet clover. These winter weeds traditionally required an early spring mowing which was eliminated with use of atrazine. In November of 1988 all registrants of atrazine voluntarily submitted an atrazine management program to the EPA. The program, accepted in 1990, resulted in benefits of: reducing applicator exposure, reducing potential groundwater and surface water infiltration, and a reduction in use sites. The program resulted in the withdrawl of the State-of-Oklahoma issued 24-C (Special Local Needs) label which amended the federal label and allowed the use of atrazine along Oklahoma roadsides. With the loss of atrazine for the 1991/92 spray season many state transportation employees were forced into using less effective and more costly alternatives. Many transportation divisions opted not to have a winter weed control program. This resulted in roadsides looking as they had prior to the integration of mechanical and chemical programs. In spring of 1992 there was again interest by registrants in obtaining a new 24-C label for use on Oklahoma roadsides. However, with the new interest came many proposed changes. First, atrazine would only be available for use by ODOT and Oklahoma Turnpike Authority personnel. This was primarily due to their familiarity with atrazine and the cooperative projects with OSU which provided training on atrazine use. Secondly, application rates have been limited to a maximum of 2.2 kg ha-1 yr-1 (2 lbs A-1 yr-1). Lastly a voluntary educational program for ODOT would be performed before use of atrazine was continued. The fall 1992 program implemented county maps with designated no-spray areas, and reinforced the 1990 label changes. Atrazine will be used on approximately three-fourths of the state highway system rights-of-way during the 1993 spray season. Managers are looking forward to clean roadsides this spring as well as enjoying the economic benefits of atrazine use." |
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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., L. M. Cargill, and D. L. Martin. 1993. The history and future use of atrazine along Oklahoma's state highway system. South. Weed Sci. Soc. Proc. 46:p. 230. |
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MSU catalog number: SB 611 .S6 v.46 |
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