DuPont Authentication Velpar H - 64953 - Manual (Page 9)

USE PRECAUTIONS - ALFALFA
• Best results are obtained when 1/2–1 inches of rainfall or
sprinkler irrigation occurs within two weeks after
application, when soil is moist at time of application, and
when weeds have not germinated or are less than 2 inches in
height or diameter. Heavy rainfall or excessive irrigation
after application may result in crop injury or poor
performance of the herbicide.
• On soils high in organic matter (greater than 5%), the
effectiveness of DuPont™ VELPAR® DF can be signifi-
cantly reduced and weed control may be unsatisfactory.
• Crop injury, including mortality, may result in fields with
restricted root growth due to non-uniform soil profiles
such as gravel bases and clay lenses.
• Crop injury may result if hot weather, mid-to-high 90
degree range or higher, occurs within a few days after
application.
• Do not apply to snow-covered or frozen ground.
• Since the effect of VELPAR® DF on alfalfa varies with soil
conditions, uniformity of application, and environmental
conditions, growers should limit their first use to small
areas.
• If abnormally dry conditions exist following application,
restrict the first irrigation to no more than 1/2 acre inch of
water.
• Temporary yellowing of alfalfa may occur following
VELPAR® DF applications.
• Treat only stands of alfalfa established for one year or for
one growing season (except in California), provided:
–The alfalfa stand has a well developed tap root structure
that is at least 10 inches in length (0.25 inch diameter
below the crown) throughout the field and the crop is
healthy, vigorous, and not under stress from weather
conditions, low fertility, insects or disease damage.
–In areas with shorter growing seasons, such as, higher
elevations, adequate alfalfa tap root growth may not occur
and especially when alfalfa is grown together with a cover
or nurse crop. If an adequate tap root is not present, delay
application of VELPAR® DF until the alfalfa has gone
through a minimum of two growing seasons.
• In California, fall planted alfalfa may be treated in the
following winter months with VELPAR® DF at 1/3 to 2/3
pounds per acre (use higher rate for fine textured soils)
provided:
- alfalfa root growth exceeds 6 inches in length
- vegetative top growth of alfalfa has lateral development of
secondary growth
- alfalfa is healthy and vigorous, not growing under stress
from insect, disease, winter injury or other types of stress.
Injury may result to alfalfa plants that fail to meet these
growth criterion listed above.
• Do not use VELPAR® DF on seedling alfalfa, alfalfa-grass
mixtures, or other mixed stands as injury may result to the
seedling alfalfa or companion crop.
• Do not use VELPAR® DF in low desert valleys in
California or Arizona.
• Do not add a surfactant to VELPAR® DF when treating
nondormant alfalfa.
• Do not use VELPAR® DF on gravelly or rocky soils,
exposed subsoils, hardpan, sand, poorly drained soil, or
alkali soils.
• Do not graze or feed forage or hay to livestock within 30
days following application.
SEED ALFALFA (CALIFORNIA ONLY)
ADDITIONAL USE PRECAUTIONS
• Do not use VELPAR® DF on fields with sandy loam or
loamy sand soils having less than 1% organic matter.
• Do not exceed 2/3 pound per acre on fields with sandy loam
or loamy sand soils having 1–2% organic matter.
• Do not exceed 2/3 pound per acre on seed alfalfa that has
been established for only one growing season.
HIGH BUSH BLUEBERRIES
VELPAR® DF is recommended for control of certain
herbaceous and woody weeds in established high bush
blueberry fields.
APPLICATION INFORMATION
VELPAR® DF may be applied to high bush blueberries that
have been established for 3 or more years. Apply
VELPAR® DF in the spring before blueberry leaf
emergence. Direct the spray solution towards the soil and
weeds.
Using calibrated ground spray equipment, make the
application in sufficient water to provide thorough and
uniform coverage to the treated area (usually 20 gallons per
acre). Shut off spray booms when starting, turning, slowing
or stopping, or injury to the crop may result.
USE PRECAUTIONS
• Do not apply through any type of irrigation system.
• Do not apply within 90 days of harvest.
• Do not apply to flooded field with standing water.
• Application to blueberry foliage will result in crop injury.
• Since the effect of VELPAR® DF on blueberries varies
with soil type, plant vigor, uniformity of applications and
amount of rainfall, it is suggested that growers limit their
first use to small areas.
LOW BUSH BLUEBERRIES
VELPAR® DF may be used for the control of certain weeds
in low bush blueberries.
BLUEBERRY
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