CONTROL AND ERADICATION OF JOHNSONGRASS

STUDIES WERE CONDUCTED TO TEST SEVERAL FORMS OF HERBICIDES, RATES AND TIMES OF APPLICATION, AND OTHER ASPECTS OF JOHNSONGRASS CONTROL TO ENABLE THE MISSOURI STATE HIGHWAY COMMISSION TO ESTABLISH EFFECTIVE ERADICATION PRACTICES. DALAPON AND DISODIUM METHANEARSONATE ARE SHOWN TO BE THE MOST EFFECTIVE SYSTEMIC HERBICIDE CONTROLS. DALAPON AT 7.4 POUNDS PER ACRE PER APPLICATION APPLIED OVER A THREE- YEAR PERIOD (88.8 POUNDS TOTAL) GAVE 95.3 PERCENT CONTROL. THE EFFECTIVENESS OF THIS CHEMICAL WAS INCREASED WITH APPROPRIATELY TIMED MOWING. DISODIUM METHANEARSONATE WAS EFFECTIVE AT THREE POUNDS PER ACRE PER APPLICATION, WITH A TOTAL OF 39 POUNDS APPLIED DURING THREE YEARS, A CONTROL OF 97 PERCENT WAS ACCOMPLISHED. THIS CHEMICAL WAS SUPERIOR TO DALPON BECAUSE TIMING IS LESS CRITICAL. IT IS MORE SELECTIVE AND IS EFFECTIVE AT HALF THE RATE OF DALAPON AND COSTS ABOUT HALF AS MUCH PER POUND. MONURON AND BROMACIL WERE THE MOST EFFECTIVE STERILANTS TESTED. IT IS NOTED THAT JOHNSONGRASS IS ONE OF THE FIRST SPECIES TO INVADE AN AREA AFTER THE EFFECTS OF A STERILANT BEGIN TO DISSIPATE.

• Supplemental Notes:
  • Hpr, 61-1
• Corporate Authors:

  University of Missouri, Columbia

  1205 University Avenue
  Columbia, MO  United States  65201

  Missouri State Highway Commission

  State Highway Building
  Jefferson City, MO  United States  65101

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Fletchall, O H
• Publication Date: 1969

Subject/Index Terms

• TRT Terms: Grasses; Herbicides; Mowing; Weed control
• Old TRIS Terms: Sterilants
• Subject Areas: Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00218036
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS, STATEDOT
• Created Date: Apr 21 1994 12:00AM