IOWA COMMERCIAL PESTICIDE
APPLICATOR CATEGORY 1A (ACTUAL)
Which formulation of 2,4-D can drift in vapor form and which cannot? -
ANSWERS-Ester 2,4-D can vapor drift
Amine 2,4-D cannot
Why does Banvel have the possibility to vapor drift after it has been applied? -
ANSWERS-Banvel changes to volatile forms on plant leaves
In Iowa, when is the general time of year when temperatures rise too high to
apply Banvel - ANSWERS-Mid-June
At above what approximate temperature does Banvel and ester based 2,4-D have
increased risk of vapor drift? - ANSWERS-85 (f)
Why is Gramoxone Extra a restricted-use pesticide? - ANSWERS-It is relatively
high in toxicity to humans with an LD50 of 120 mg/kg
Why is Tordon a restricted-use pesticide? - ANSWERS-It is hazardous to non-
target broadleafs and has a potential to remain active in soil for more than a year.
, After which stage should you not apply 2,4-D and MCPA to small grains? -
ANSWERS-Boot stage
If you plan on using 2,4-D amine on oats underseeded with a legume, what should
you wait for before applyication? - ANSWERS-Weeds and oats should be 6-12
inches tall and form a protective canopy over the legume.
What is a benefit to using Eptam, Balan, and Poast Plus when seeding alfalfa? -
ANSWERS-A small grain companion crop is not required
When should annual broadleaf leaves be sprayed in pastures? - ANSWERS-Spring,
after they have fully expanded leaves
Why do many pasture herbicides have grazing restrictions? - ANSWERS-To
prevent the occurrence of illegal residues in meat or milk
At greater than what soil pH level should you not use Canopy, Preview, and Lorox
Plus due to carryover risk? - ANSWERS-6.8
What is the greatest hazard when applying most herbicides? - ANSWERS-Injury to
nontarget plants
Name some herbicides which are very effective against germinating weeds but
less effective on established weeds. - ANSWERS-Frontier, Lasso, and Dual
APPLICATOR CATEGORY 1A (ACTUAL)
Which formulation of 2,4-D can drift in vapor form and which cannot? -
ANSWERS-Ester 2,4-D can vapor drift
Amine 2,4-D cannot
Why does Banvel have the possibility to vapor drift after it has been applied? -
ANSWERS-Banvel changes to volatile forms on plant leaves
In Iowa, when is the general time of year when temperatures rise too high to
apply Banvel - ANSWERS-Mid-June
At above what approximate temperature does Banvel and ester based 2,4-D have
increased risk of vapor drift? - ANSWERS-85 (f)
Why is Gramoxone Extra a restricted-use pesticide? - ANSWERS-It is relatively
high in toxicity to humans with an LD50 of 120 mg/kg
Why is Tordon a restricted-use pesticide? - ANSWERS-It is hazardous to non-
target broadleafs and has a potential to remain active in soil for more than a year.
, After which stage should you not apply 2,4-D and MCPA to small grains? -
ANSWERS-Boot stage
If you plan on using 2,4-D amine on oats underseeded with a legume, what should
you wait for before applyication? - ANSWERS-Weeds and oats should be 6-12
inches tall and form a protective canopy over the legume.
What is a benefit to using Eptam, Balan, and Poast Plus when seeding alfalfa? -
ANSWERS-A small grain companion crop is not required
When should annual broadleaf leaves be sprayed in pastures? - ANSWERS-Spring,
after they have fully expanded leaves
Why do many pasture herbicides have grazing restrictions? - ANSWERS-To
prevent the occurrence of illegal residues in meat or milk
At greater than what soil pH level should you not use Canopy, Preview, and Lorox
Plus due to carryover risk? - ANSWERS-6.8
What is the greatest hazard when applying most herbicides? - ANSWERS-Injury to
nontarget plants
Name some herbicides which are very effective against germinating weeds but
less effective on established weeds. - ANSWERS-Frontier, Lasso, and Dual
