DuPont Authentication H - 65190 Insect Control Equipment User Manual


 
DuPont™ VELPAR® DF herbicide is a water-dispersible
g
ranule that is mixed in water and applied as a spray for
weed control in certain crops, Christmas trees, forestry site
preparation and release areas, and industrial areas. It may
also be applied as a basal soil treatment for brush control in
reforestation areas, rangeland, pastures and noncrop areas.
VELPAR® DF is an effective general herbicide providing
both contact and residual control of many annual and
biennial weeds and woody plants. It is also effective for
control of most perennial weeds.
VELPAR® DF is noncorrosive to equipment.
Caution should be exercised when applying VELPAR® DF
near desirable trees or shrubs as they can absorb VELPAR®
DF through roots extending in to treated areas.
This product may be applied on conifer plantations and non-
crop sites that contain areas of temporary surface water
caused by collection of water between planting beds, in
equipment ruts, or in other depressions created by
management activities. It is permissible to treat intermittent
drainage, intermittently flooded low lying sites, seasonally
dry flood plains and transitional areas between upland and
lowland sites when no water is present. It is also permissible
to treat marshes, swamps and bogs after water has receded,
as well as seasonally dry flood deltas. DO NOT make
applications to natural or man-made bodies of water such as
lakes, reservoirs, ponds, streams and canals.
ENVIRONMENTAL CONDITIONS
AND BIOLOGICAL ACTIVITY
VELPAR® DF is absorbed through the roots and foliage.
Moisture is required to activate VELPAR® DF in the soil.
Best results are obtained when the soil is moist at the time
of application and 1/4–1/2 inches of rainfall occurs within 2
weeks after application.
For best results, apply VELPAR® DF preemergence or
postemergence when weeds are less than 2 inches in height or
diameter. Herbicidal activity is most effective under conditions
of high temper
a
ture (above 80 °F), high humidity, and good soil
moisture
. Herbicidal activity ma
y be reduced when vegetation is
dormant, semi-dormant, or under stress(e.g. temperature or
moisture).
Herbicidal activity will usually appear within 2 weeks after
application to susceptible plants under warm, humid conditions;
w
hile 4–6 weeks may be required when weather is cool or dry,
or when susceptible plants are under stress. If rainfall after
application is inadequate to activate VELPAR® DF in the soil,
plants may recover from contact effects and continue to grow.
On woody plants, symptoms usually appear within 3–6 weeks
after sufficient rainfall has carried the herbicide into the root
zone during periods of active growth. Defoliation and
subsequent refoliation may occur, but susceptible plants are
killed.
The degree and duration of control will depend on the following:
Use rate
Weed spectrum and size at time of application
Environmental conditions at and following treatment
Where a rate range is shown, use the higher levels of the dosage
range on hard-to-control species, fine-textured soils, or soils
containing greater than 5% organic matter or carbon. Use the
l
ower levels of the dosage range on coarse-textured soils and/or
on soils low in organic matter. Refer to specific uses for rate
ranges.
APPLICATION INFORMATION
VELPAR® DF may be applied by ground equipment and,
where permitted, aerial equipment. Use rates, minimum spray
gallonage, and other application information are described for
various uses.
Dispose of the equipment washwater by applying it to a use-
site listed on this label or in accordance with directions given
in the “Storage and Disposal” section of this label.
Before spraying, calibrate equipment to determine the quantity
of water necessary to uniformly and thoroughly cover the
vegetation and soil in a measured area to be treated. Make sure
the volume of water is sufficient to completely suspend the
VELPAR® DF.
TANK MIXTURES
VELPAR® DF herbicide may be tank mixed with other
herbicides and /or adjuvants registered for the uses (crops)
specified in the label.
Refer to the label of the tank mix partner(s) for any additional
use instructions or restrictions.
RESISTANCE
When herbicides that affect the same biological site of
action are used repeatedly over several years to control the
same weed species in the same field, naturally-occurring
resistant biotypes may survive a correctly applied herbicide
treatment, propagate, and become dominant in that field.
Adequate control of these resistant weed biotypes cannot be
expected. If weed control is unsatisfactory, it may be
necessary to retreat the problem area using a product
affecting a different site of action.
T
o better manag
e herbicide resistance through delaying the
proliferation and possible dominance of herbicide resistant
w
eed biotypes, it may be necessary to change cultural
practices within and between crop seasons such as using a
combina
tion of tilla
g
e
,
r
etreatment, tank-mix partners
and/or sequential herbicide applications that have a different
site of action. W
eed escapes that are allowed to go to seed
will pr
omote the spr
ead of r
esistant biotypes.
It is advisable to keep accurate records of pesticides applied
to individual fields to help obtain information on the spread
and dispersal of resistant biotypes. Consult your
a
g
r
icultur
al dealer, consultant, applicator, and/or appropriate
sta
te a
g
r
icultur
al e
xtension ser
vice r
epresentative for
specific alternative cultural practices or herbicide
r
ecommenda
tions available in your area.
GENERAL INFORMATION
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