glyphosate
Rate 1.5 to 3 lb ae/A or 1.5 to 2% solution for handgun sprayer application.
Time Apply to actively growing plants in the spring.
Remarks See Forestry section of this handbook for information on control in conifers. Adding a recommended surfactant improves results.
Caution Also controls grasses and other plants needed to compete with Scotch broom seedlings.
Site of action Group 9: inhibits EPSP synthase
Chemical family None generally accepted
triclopyr ester (Garlon 4) or triclopyr amine (Garlon 3A) or triclopyr + 2,4-D LV ester (Crossbow)
Rate 0.5 to 1.5% concentration of Garlon 4 or Crossbow, or 1 to 1.5% concentration of Garlon 3A
Time Apply any time plants are actively growing. Garlon 4 and Crossbow can be used for basal bark applications any time of year.
Remarks Foliage must be thoroughly wet. For Garlon 3A, it is especially important to use a high volume of water (100 gal/A or more).
Caution Garlon products are registered for use on rights-of-way, industrial sites, and forestry (release and site preparation). Crossbow can be used on permanent pastures and rangeland up to 1.5 lb ae/A. Observe all grazing and harvesting restrictions.
Site of action (all) Group 4: synthetic auxin
Chemical family (triclopyr) pyridine; (2,4-D) phenoxy acetic acid