For most brush species, ranchers tend to
think of late spring and early summer as the season for herbicide
spraying. That is the best time for
foliar applications on many hardwood species.
But if you run out of time before you run out of brush, you can change
your tactics to continue brush control into the fall.
You
can spray brush that’s susceptible to foliar application in the fall, or switch
to methods of application that don’t depend on leaves to absorb the herbicide.
Basal
bark applications aren’t dependent on leaves, and cool fall days may be the
most comfortable time for working at individual plant treatment. With Remedy herbicide, streamline basal
application and low volume basal application are effective on a wide variety of
brush species year-round.
For
some species, such as mesquite, optimal control has been achieved by treating
anytime the brush has mature leaves, roughly May through September. But later basal applications still provide
acceptable control – often better than optimally timed foliar treatments. Compared to foliar applications, basal
applications are more consistent from year to year. On greenbriar, dormant season treatment can
be just as effective as a growing season application.
With
low volume basal application, fall applications have been successful with a mix
of 25% Remedy herbicide and 75% diesel fuel.
Spray the lower 15 to 20 inches of stem.
Wet all sides of the stem, but not to the point of runoff. The method is best suited to slick-barked
stems less than 6 inches in diameter.
For
streamline basal application, fall applications have been successful with a mix
of either 25% Remedy and 75% diesel, or 25% Remedy, 10% penetrant (such as
Cide-Kick, Cide-Kick II, AD 100 or Quick Step II) and 65% diesel. Apply the mix with a straight stream nozzle
in a 2 to 3 inch wide band completely around the stem. Streamline basal is best suited to
slick-barked stems less than 3 inches in diameter.
With
streamline basal, the penetrant seems to improve control on greenbriar, yaupon,
pricklyash and Texas persimmon. On other
species it may not increase control, but it may improve coverage around the
stem, especially on cooler days when diesel is more viscous. If the penetrant saves a little time, the
additional cost may be made up in labor savings. If you can spray the stem from one side – and
still have the solution circle the stem – you can save mixture.
For
almost any brush species, an option that’s effective any time of year,
including winter, is cutting the brush and then treating the freshly cut
stump. For these applications, use a
mixture of 25% Remedy and 75% diesel fuel.
Spray the sides and outer portion of the cut surface including the cambium. Thoroughly wet the cut surface, stem and root
collar, but not to the point of runoff.
For
more information on fall brush control methods, contact me at the County
Extension office at 940-627-3341.