Iowa Herbicide Right of Way - Category 6, Iowa Pesticide
| Actual Test Questions and Verified Answers
– Complete Exam Preparation Material
in early spring when sod has greened - Growth regulator application is most effective when applied:
A. in early spring when sod has greened
B. in late spring when sod has grown at least 2"
C. after 3 times mowing
D. in fall just prior to leaf fall
Both B and C
D
Which procedures will help reduce herbicide drift?
A. Increasing spray pressure
O
B. Reducing spray pressure
C. Hanging nozzles to a type which emits larger droplets
D. Reducing height of boom
N
E. Both B and C
O
They do not damage grasses - Phenoxy herbicides are widely used along roadsides because:
A. They are effective on a wide variety of broadleaf and woody species
T
B. They rarely damage plants in adjacent areas
C. They are high in human toxicity
C
D. They do not damage grasses
E. Both A and D
O
Dichlobenil - Which of the following nonselective herbicides has the longest period of control, when
PY
used at a given site:
A. Bromacil
B. Dichlobenil
C. Prometon
D. Tebuthiuron
During early flowering - When is the best time to treat many perennials developing from an established
root system?
Outside an area equal to twice the height of the desirable trees - In order to avoid injury to nearby
desirable trees; persistent, nonselective herbicides such as Hyvar should be applied:
A. Only in the fall
B. Outside the drip line of the desirable trees
C. At least 10 feet from the desirable trees
D. Outside an area equal to twice the height of the desirable trees
, E. A minimum of 1/2 mile from the desirable trees
The bark prevents penetration of the herbicide and reduces effectiveness - Basal bark treatment is not
recommended for wood species larger than 6" in diameter because: A. The bark prevents penetration
of the herbicide and reduces effectiveness
B. The cost is prohibitive
C. There is a high risk of driftD. None of the above
They can damage desirable plants at very low rates, making them susceptible to drift damage - A major
disadvantage of the phenoxy-herbicides is:
A. They are non-selective herbicides
B. They can damage desirable plants at very low rates, making them susceptible to drift damage
C. They are highly toxic to wildlife
D. They persist in the soil for several years
Little effect is seen the year of application - Krenite is different from most brush herbicides because:
D
A. It can be applied either to the foliage or the soil
B. Little effect is seen the year of application
O
C. Both A and B
D. None of the above
N
Wettable powders - Which of the following formulations do not dissolve in water?
A. Wettable powders
O
B. Soluble powders
C. Emulsifiable concentrate
T
D. All of the above dissolve in water
10 - Herbicide spraying can be performed, as a general rule, until wind speed exceeds ___ miles per
C
hour.
O
Leaching - The downward movements of pesticides in the soil is called _____.
PY
Perennial - Which type of weed is best controlled in early bloom?
A. Annual
B. Biennial
C. Perennial
D. Herbaceous
All of the above - Pesticides may move from the target area and damage the environment by:
A. Drift
B. Soil runoff or soil erosion
C. Leaching through the soil
D. All of the above
Possible throughout the year - Basal bark applications are:
A. Effective on woody species up to 10"
B. Possible throughout the year
| Actual Test Questions and Verified Answers
– Complete Exam Preparation Material
in early spring when sod has greened - Growth regulator application is most effective when applied:
A. in early spring when sod has greened
B. in late spring when sod has grown at least 2"
C. after 3 times mowing
D. in fall just prior to leaf fall
Both B and C
D
Which procedures will help reduce herbicide drift?
A. Increasing spray pressure
O
B. Reducing spray pressure
C. Hanging nozzles to a type which emits larger droplets
D. Reducing height of boom
N
E. Both B and C
O
They do not damage grasses - Phenoxy herbicides are widely used along roadsides because:
A. They are effective on a wide variety of broadleaf and woody species
T
B. They rarely damage plants in adjacent areas
C. They are high in human toxicity
C
D. They do not damage grasses
E. Both A and D
O
Dichlobenil - Which of the following nonselective herbicides has the longest period of control, when
PY
used at a given site:
A. Bromacil
B. Dichlobenil
C. Prometon
D. Tebuthiuron
During early flowering - When is the best time to treat many perennials developing from an established
root system?
Outside an area equal to twice the height of the desirable trees - In order to avoid injury to nearby
desirable trees; persistent, nonselective herbicides such as Hyvar should be applied:
A. Only in the fall
B. Outside the drip line of the desirable trees
C. At least 10 feet from the desirable trees
D. Outside an area equal to twice the height of the desirable trees
, E. A minimum of 1/2 mile from the desirable trees
The bark prevents penetration of the herbicide and reduces effectiveness - Basal bark treatment is not
recommended for wood species larger than 6" in diameter because: A. The bark prevents penetration
of the herbicide and reduces effectiveness
B. The cost is prohibitive
C. There is a high risk of driftD. None of the above
They can damage desirable plants at very low rates, making them susceptible to drift damage - A major
disadvantage of the phenoxy-herbicides is:
A. They are non-selective herbicides
B. They can damage desirable plants at very low rates, making them susceptible to drift damage
C. They are highly toxic to wildlife
D. They persist in the soil for several years
Little effect is seen the year of application - Krenite is different from most brush herbicides because:
D
A. It can be applied either to the foliage or the soil
B. Little effect is seen the year of application
O
C. Both A and B
D. None of the above
N
Wettable powders - Which of the following formulations do not dissolve in water?
A. Wettable powders
O
B. Soluble powders
C. Emulsifiable concentrate
T
D. All of the above dissolve in water
10 - Herbicide spraying can be performed, as a general rule, until wind speed exceeds ___ miles per
C
hour.
O
Leaching - The downward movements of pesticides in the soil is called _____.
PY
Perennial - Which type of weed is best controlled in early bloom?
A. Annual
B. Biennial
C. Perennial
D. Herbaceous
All of the above - Pesticides may move from the target area and damage the environment by:
A. Drift
B. Soil runoff or soil erosion
C. Leaching through the soil
D. All of the above
Possible throughout the year - Basal bark applications are:
A. Effective on woody species up to 10"
B. Possible throughout the year
