13
Non-ionic surfactants do not break down in water.
Consequently, they are unaffected by hard water, can
be used in strong acid solutions and are more soluble
in cold water than in hot water. Some of the
commonly recommended non-ionic surfactants for
herbicide mixtures are Agral 90, LI 700, Ag-Surf,
Companion, Citowett Plus, Enhance, Super Spreader,
Tween 20.
Preparing a tank mix
To avoid physical incompatibilities, go through the
following general steps or use the appropriate mixing
instructions below:
•
add half the required amount of water and mix
with one pesticide
•
agitate
•
with agitator running, add the other pesticide. Add
pesticides to the spray tank in the following order
to reduce the possibility of formation of
precipitates or gums that may clog nozzles and
filters:
–
soluble powders
–
wettable powders and flowable liquids
–
solutions (amines and salts)
–
emulsifiable concentrates (esters)
–
additives (surfactants)
Specific Mixing Instructions
“
a”
Single product mixing instructions
1.
Fill clean tank to ½ full with clean water.
2.
Turn on full agitation.
3.
Add the proper amount of herbicide to the water in
the spray tank with the agitator running. Maintain
full agitation until completely dissolved and
product is fully dispersed. Continuous agitation
is required to keep the product in suspension.
4.
After herbicide has been well mixed and is
in suspension, add tank mix partners and
then a recommended non-ionic surfactant,
if required.
5.
Add the remainder of the water.
On repeat tank loads, ensure that the amount of spray
solution left in the tank from the previous load is less
than 10% of the volume to be mixed.
“
b”
1.
Fill tank ½ full of water.
2.
Start sprayer agitation.
3.
Add Group 2 herbicide and agitate vigorously,
if a granule, agitate until dissolved.
4.
Add tank mix partner herbicide and continue
to agitate.
5.
Add adjuvant (if required) and continue to
agitate.
6.
Add antifoaming agent if required and continue
agitation.
7.
Complete filling of the tank with the balance
of the water.
8.
If tank mix partner is an E.C. (emulsifiable
concentrate), do not over agitate, to avoid
inducing an invert emulsion.
“
c”
1.
Clean spray tank and ½ fill with clean water.
Start agitation or bypass system.
2.
Add broadleaf herbicide to the tank first prior
to adding grassy herbicide and agitate for
2 - 3
minutes.
3.
Add correct amount of grassy herbicide.
4.
Agitate for 2 - 3 minutes.
5.
Add correct amount of adjuvant (if required).
6.
Agitate for 1 - 2 minutes before adding
remainder of water.
7.
After any break in spraying operations, agitate
thoroughly before spraying again.
8.
Use the spray suspension as soon as it is prepared.
9.
If an oil film starts to build up in the tank,
drain tank and then clean with a detergent.
“
d”
1.
Ensure the spray tank is thoroughly clean.
2.
Fill the tank ½ to
¾
’
s full with clean water and
start agitation or bypass system.
3.
Add grassy herbicide first. Vigorously agitate
until dissolved.
4.
Add broadleaf herbicide product second
followed by any registered tank mix partner
(
if desired).
5.
Add adjuvant/surfactant(if required) and
complete filling the spray tank.