SOIL-APPLIED HERBICIDES IN THE CONTROL OF TEMPERATE ZONE GRASSES, BROADLEAF WEEDS AND WOODY PLANTS

BROMACIL BIOASSAYS WITH OATS REVEALED A CONTINUOUS LOSS OF HERBICIDE OVER AN 18-MONTH PERIOD WITH SIGNIFICANT RESIDUES DETECTED AT 3 OF 4 FIELD SITES. BROMACIL WAS PERSISTENT IN THE HIGHLY ORGANIC SURFACE LAYERS OF A LOAMY SAND SOIL. A SIMPLIFIED CUCUMBER RADICLE-LENGTH ASSSAY USED FOR PICLORAM DID NOT PROVE SATISFACTORY FOR RESIDUE PREDICTION. DATA FROM THE CUCUMBER ASSAYS INDICATED PICLORAM TO BE VERY PERSISTENT IN SOIL AFTER AN INITIAL 6-MONTHS DISAPPEARANCE. REGRESSION ANALYSES EXPLAINED BROMACIL AND PICLORAM RESIDUE VARIANCE ON THE BASIS OF SOIL VARIABLES IN TIME-STRATIFIED RESIDUE SERIES ON MICROCLIMATIC VARIABLES IN DEPTH-STRATIFIED SERIES. OF 180 SPECIES TAXONOMICALLY CLASSIFIED, THREE SPECIES WERE DOMINANT: POVERTY GRASS, KENTUCKY BLUEGRASS, AND TIMOTHY. TOTAL VEGETATION CONTROL OCCURRED WITH BROMACIL WETTABLE POWDER, TANDEX GRANULAR, TANDEX WETTABLE POWDER, AND PICLORAM/DIURON. /AUTHOR/

• Corporate Authors:

  Pennsylvania State University, University Park

  Pennsylvania Transportation Institute, Transportation Research Building
  University Park, PA  United States  16802
• Authors:
  • Shipman, R D
• Publication Date: 1971-8

Media Info

• Pagination: 153 p.

Subject/Index Terms

• TRT Terms: Grasses; Herbicides; Shrubs; Vegetation; Waste products (Materials); Weed control
• Subject Areas: Design; Environment; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00219018
• Record Type: Publication
• Source Agency: National Technical Information Service
• Files: TRIS
• Created Date: Jun 25 1973 12:00AM