procedure. Carefully read and follow the individual cleaner
instructions. Consult your Ag dealer, applicator, or DuPont
r
epresentative for a listing of approved cleaners.
Notes:
1
.
C
AUTION:
D
o not use chlorine bleach with ammonia
because dangerous gases will form. Do not clean
equipment in an enclosed area.
2
. Steam-cleaning aerial spray tanks is recommended prior
to performing the above cleanout procedure to facilitate
the removal of any caked deposits.
3. When DuPont™ HARMONY® GT XP is tank mixed
with other pesticides, all cleanout procedures for each
product should be examined and the most rigorous
procedure should be followed.
4. In addition to this cleanout procedure, all precleanout
guidelines on subsequently applied products should be
followed as per the individual product labels.
5. Where routine spraying practices include shared equipment
frequently being switched between applications of
HARMONY® GT XP and applications of other pesticides
to HARMONY® GT XP -sensitive crops during the same
spray season, it is recommended that a sprayer be dedicated
to HARMONY® GT XP to further reduce the chance of
crop injury.
SPRAY DRIFT MANAGEMENT
The interaction of many equipment and weather-related
factors determines the potential for spray drift. The applicator
is responsible for considering all these factors when making
application decisions.
IMPORTANCE OF DROPLET SIZE
The most effective way to reduce drift potential is to apply
large droplets (>150 - 200 microns). The best drift
management strategy is to apply the largest droplets that
provide sufficient coverage and control. The presence of
sensitive species nearby, the environmental conditions, and
pest pressure may affect how an applicator balances drift
control and coverage. APPLYING LARGER DROPLETS
REDUCES DRIFT POTENTIAL, BUT WILL NOT
PREVENT DRIFT IF APPLICATIONS ARE MADE
IMPROPERLY OR UNDER UNFAVORABLE
ENVIRONMENTAL CONDITIONS! See Wind,
Temperature and Humidity, and Temperature Inversions
sections of this label.
Controlling Droplet Size - General Techniques
• Volume - Use high flow rate nozzles to apply the highest
practical spray volume. Nozzles with higher rated flows
produce larger droplets.
• Pressure - Use the lower spray pressures recommended for
the nozzle. Higher pressure reduces droplet size and does
not improve canopy penetration. WHEN HIGHER FLOW
RATES ARE NEEDED, USE A HIGHER-CAPACITY
NOZZLE INSTEAD OF INCREASING PRESSURE.
•
Nozzle Type - Use a nozzle type that is designed for the
i
ntended application. With most nozzle types, narrower
spray angles produce larger droplets. Consider using low-
d
rift nozzles.
Controlling Droplet Size - Aircraft
• N
umber of Nozzles
-
Use the minimum number of nozzles
w
ith the highest flow rate that provide uniform coverage.
• Nozzle Orientation - Orienting nozzles so that the spray is
emitted backwards, parallel to the airstream will produce
larger droplets than other orientations.
• Nozzle Type - Solid stream nozzles (such as disc and core
with swirl plate removed) oriented straight back produce
larger droplets than other nozzle types.
• Boom Length - The boom length should not exceed 3/4 of
the wing or rotor length - longer booms increase drift
potential.
•
Application Height - Application more than 10 ft above
the canopy increases the potential for spray drift.
BOOM HEIGHT
Setting the boom at the lowest referenced height (if
specified) which provides uniform coverage reduces the
exposure of droplets to evaporation and wind. For ground
equipment, the boom should remain level with the crop and
have minimal bounce.
WIND
Drift potential increases at wind speeds of less than 3 mph
(due to inversion potential) or more than 10 mph. However,
many factors, including droplet size and equipment type
determine drift potential at any given wind speed. AVOID
APPLICATIONS DURING GUSTY OR WINDLESS
CONDITIONS.
Note: Local terrain can influence wind patterns. Every
applicator should be familiar with local wind patterns and
how they affect spray drift.
TEMPERATURE AND HUMIDITY
When making applications in hot and dry conditions, set up
equipment to produce larger droplets to reduce effects of
evaporation.
TEMPERATURE INVERSIONS
Drift potential is high during a temperature inversion.
Temperature inversions restrict vertical air mixing, which
causes small suspended droplets to remain close to the
ground and move laterally in a concentrated cloud.
Temperature inversions are characterized by increasing
temperature with altitude and are common on nights with
limited cloud cover and light to no wind. They begin to
form as the sun sets and often continue into the morning.
Their presence can be indicated by ground fog; however, if
fog is not present, inversions can also be identified by the
movement of smoke from a ground source or an aircraft
smoke generator. Smoke that layers and moves laterally in
a concentrated cloud (under low wind conditions) indicates
an inversion, while smoke that moves upward and rapidly
dissipates indicates good vertical air mixing.
SHIELDED SPRA
YERS
Shielding the boom or individual nozzles can reduce the
effects of wind. However, it is the responsibility of the
applicator to verify that the shields are preventing drift and
not interfering with uniform deposition of the product.
AVOIDING SPRAY DRIFT IS THE RESPONSIBILITY
OF THE APPLICATOR.
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