Vol. 15—1961 - NorthEastern Weed Science Society

" A Progress Report on Urab * Brush Killer
R. L. Pierpont
INTRODUCTION
During the last several years Urab has been tested for
the control of brush on utility, highway and railroad right-ofways
in the United states and Canada. The purpose of this
paper is to discuss the results obtained with granular, pellet,
and oil or water emulsifiable liquid Urab formulations on
numerous species of woody plants.
In brush control work, herbicides are generally used as
broadcast or selective treatments. Over the years the broadcast
technique has been most widely used; however, in recent
years, due to the increased interest among wildlife agencies,
conservation groups and progressive utility companies, the
selective approach is gaining in favor. The commercially available
formulations of Urab are applicable for use as either broadcast
or selective treatments dependent upon its envisaged use.
FORMULATIONS & RESULTS
The rate of Urab required to control brush, and the length
of time necessary for the herbicide to take effect depends upon
the species, age, and grOWing stage of the brush to be controlled,
soil type, soil moisture at the time of application,
rainfall following application, type of formulation and method
of application used. Urab 22% Granular or 25% pellets are
generally used at rates of 80-120 Ib/A broadcast evenly over
the area to be treated, or as spot and basal applications of
1-2 oz per clump. The 3 lb/gal liqUid concentrate formUlation
is used at rates of 6-9 gpa diluted in enough water or oil
(kerosene, fuel Oil, diesel oil or aromatic weed 011) to give
good coverage. Approximately 75-150 gpa is needed, depending
on the size and density of the brUSh. In spot or basal applications,
2-3 tablespoons (1-11r fluid oz) of undiluted Urab
Liquid Concentrate are u~ed per clump, depending on the size of
the clump, or the Urab Liquid Concentrate may be diluted at the
rate of 1 qt/5 gal of water or oil and applied evenly to the
base or root area of the plant at the rate of 112 to 1-1/2 pt
per clump.
l
* Trade mark of Allied Chemical Corporation - 3-phenyl-1,
l-dimethylurea trichloroacetate (formerly GC-26(3).
1) General Chemical Division, Allied Chemical Corp., New York, N.Y.