Control of Woody and Herbaceous Vegetation with Soil Sterilants

Abstract
Spring and fall applications of 10 soil sterilant herbicides were investigated for control of brush and herbaceous vegetation at 5 locations in Texas. A majority of the herbicides controlled most brush species. However, 5-bromo-3-sec-butyl-6-methyluracil (bromacil), 2-methoxy-4,6-bis(isopropyl-amino)-s-triazine (prometone), and 4-amino-3,5,6-trichloropicolinic acid (picloram) were most effective at all locations. A mixture of disodium tetraborates, 3-(p-chlorophenyl)-l,l-dimethylurea (monuron) and trichlorobenzoic acid was very effective for at least 20 months at 4 of the 5 locations. Most herbicides controlled herbaceous vegetation for 1 year or less. Bromacil controlled herbaceous vegetation for approximately 2 years at most locations.