Vol. 15—1961 - NorthEastern Weed Science Society

Basal applications can be applied effectively
anytime of the year if the chemical mixture is
applied properly. Such application frequently costs
50~ or more than the foliage program. For this
reason~the initial application method along roads~des~sually
is not basal. When a high percentage
QT··the· .undesirable hardwoods has been controlled by
foliage application, basal application then becomes
economical. It is also very selective and the desirable;
low growing shrubbery can remain unharmed.
3~ StUmp treatment; Stump treatment is the third
method ..of application used widely in the New England
States~·, The mixture is the same as for basal treatment,
us~ng 3 to 4 gallons of a 4 lb. 2,4,5-T formulation
in 100 gallons of fuel oil, Diesel Oil,
cir kerosene. This application is used frequently
where an area is first cleared or re-cut. It is
import.ant, as with basal application, to treat the
stump completely to point of run-off in the root
collar zone. Less volume usually is applied to
stumps than with the basal application due to the
lesser bark area covered. This results in reduced
cost; however, the percentage of human error ia somewhat
increased. Volumes of chemical mixture applied
per acre range from 35 to 60 gallons with an average
of 45 gallons.
4. Dormant Broadcast: Dormant Broadcast application.,
using 2,4 5-T at a gallon and a half (6 pounds
acid equivalent~ in 100 gallons of oil is presently
being evaluated. The results thus far indicate good
stem kill; however, more resprouting has been noted
than with the basal method of application.
5. Invert Emulsions: Invert formulations containirig
2 pounds of 2,4,5-T per gallon are also
presently being evaluated for roadside chemical
brush control. Inverts are formed by adding water
to a special chemical oil mixture with continuous
agitation. The oil and chemical surround the water
particles and a mayonnaise-like mixture is obtained.
This invert mixture varies in consistency from that
of mayonnaise to a thick paste. The consistency of
the material depends on the relative amounts of oil
and water in the mixture. Tests were made in the
Spring and Fall of 1959 in the states of Maine and
Connecticut, and in the Spring of 1960 in Connecticut
using from 1-1/2 gallons to 3 qallons {of the 2· pounds
2,4,5-T acid equivalent gallon} with 14 gallons of
No. 2 fuel oil in 100 gallons of water. The complete
stem was sprayed prior to bud-break in the Spring
of 1959, and the results were excellent. Fall appli-'
cations the same year in Connecticut, using the same