DuPont Authentication Velpar H - 64953 - Manual (Page 23)

SPECIFIC WEED PROBLEMS
Control of Canada Thistle in Crown Vetch - DuPont™
VELPAR® DF is recommended for control of Canada thistle in
established stands of crown vetch on noncrop sites. Make a
single application of 1 - 1 2/3 lb of VELPAR® DF from late
spring through mid-summer, when thistle is actively growing
prior to flowering. Do not use a surfactant. Some discoloration
of the crown vetch foliage may occur after application.
SPRAY EQUIPMENT
Apply VELPAR® DF uniformly over the desired area using
ground equipment or helicopter. Do not apply more than 8 lbs
per acre by air.
Use enough water for thorough coverage. For ground
application this is usually a minimum of 25 gallons per acre.
Higher application volumes may be needed to obtain uniform
application with handgun equipment. For aerial applications
(helicopter only) this is usually a minimum of 5 gallons per
acre. Higher volumes of water may be needed when water
temperatures are cold or the higher rates of VELPAR DF are
used.
INDUSTRIAL TURF
(UNIMPROVED ONLY)
VELPAR® DF is recommended for selective weed control in
established stands of bermudagrass and/or bahiagrass in noncrop
areas.
APPLICATION TIMING
Make a single application of VELPAR® DF per year when
weeds are actively growing.
WEEDS CONTROLLED - USE RATE
VELPAR® DF effectively controls the following weeds at the
rates shown in industrial turf (unimproved only). Use a lower
rate on coarse-textured soils (sand to sandy loam). Use the
higher rate on fine-textured soils (clay loam to clay) and on soils
high in organic matter.
9/10 - 1 1/2 Lb/Acre
* Suppression may result with some of the giant (larger) smutgrass
species.
Suppression – a visible reduction in plant population and/or plant vigor
as compared to an untreated area and generally not accepted as control.
SPRAY EQUIPMENT
Apply VELPAR® DF uniformly over the desired area using
ground equipment only.
For ground application, use enough water for thorough
coverage usually a minimum of 25 gallons per acre. The use
of a surfactant is not recommended.
USE PRECAUTIONS
INDUSTRIAL UNIMPROVED TURF
• Use VELPAR® DF only in stands of bermudagrass and
bahiagrass established for at least one year. Do not treat newly
sprigged or sodded areas.
• Some discoloration of the bermudagrass or bahiagrass may
occur after application.
• Injury may result when desirable grasses are under stress from
drought, insects, disease, cold temperature, or poor fertility.
• Severe turf injury may occur if applications are made on
gravelly or rocky soils, thinly covered subsoils, or soils with
less than 1% organic matter.
NON-CROP
BRUSH CONTROL
VELPAR® DF is recommended for the control of
undesirable brush in non-crop sites.
APPLICATION INFORMATION
Apply VELPAR® DF from late winter through summer,
prebud break until new growth hardens off.
In areas where the soil remains frozen during the winter and
spring rains are usually inadequate for soil activation, a fall
or winter treatment may be applied before the soil freezes.
BROADCAST
Apply 5 1/3 to 10 2/3 lb of VELPAR® DF per acre as a
coarse spray by ground equipment or 5 1/3 to 8 lb per acre by
air (helicopter only). Use enough water for thorough
coverage. For ground equipment, usually a minimum of 25
gallons per acre. For aerial equipment, usually a minimum of
10 gallons per acre. Higher volumes of water may be needed
when water temperatures are cold or the higher rates of
VELPAR® DF are used.
BASAL (SOIL)
SINGLE STEM TREATMENT
Mix 2 2/3 pounds of VELPAR® DF with sufficient water to
make one gallon of suspension and thoroughly agitate. Apply
the VELPAR® DF suspension with an exact-delivery
handgun applicator. This equipment delivers a thin stream of
predetermined volume when triggered. Apply the VELPAR®
DF suspension at the rate of 2 to 4 ml for each inch of stem
diameter at breast height.
Direct the treatment to the soil within 3 feet of the root collar
of woody plants to be controlled.
For multi-stemmed and low-growing brush that have stem
diameters that are difficult to determine, apply the VELPAR®
DF suspension at the rate of 2 to 4 ml per 3 feet of canopy
width. For tall, slender (columnar) brush types, apply 4 to 8
ml per 3 feet of height. Base the rate on whichever canopy
dimension is greater (width or height).
Barley, little Hordeum pusillum
Barnyardgrass Echinochloa crus-galli
Dogfennel Eupatorium capillifolium
Fescue Festuca spp
Lespedeza Lespedeza cuneata
Oxalis Oxalis spp
Passionflower, maypop Passiflora incarnate
Pepperweed, Virginia Lepidium virginicum
Pigweed Amaranthus spp
Smutgrass* Sporobolus indicus
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