Iowa Herbicide Right of Way - Category 6
UPDATED ACTUAL Exam Questions and
CORECT Answers
in early spring when sod has greened - CORRECT ANSWER - 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 - CORRECT ANSWER - Which procedures will help reduce herbicide
drift?
A. Increasing spray pressure
B. Reducing spray pressure
C. Hanging nozzles to a type which emits larger droplets
D. Reducing height of boom
E. Both B and C
They do not damage grasses - CORRECT ANSWER - Phenoxy herbicides are widely used
along roadsides because:
A. They are effective on a wide variety of broadleaf and woody species
B. They rarely damage plants in adjacent areas
C. They are high in human toxicity
D. They do not damage grasses
E. Both A and D
Dichlobenil - CORRECT ANSWER - Which of the following nonselective herbicides has
the longest period of control, when used at a given site:
,A. Bromacil
B. Dichlobenil
C. Prometon
D. Tebuthiuron
During early flowering - CORRECT ANSWER - 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 - CORRECT ANSWER - 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 - CORRECT
ANSWER - 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 drift
D. None of the above
They can damage desirable plants at very low rates, making them susceptible to drift damage -
CORRECT ANSWER - 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 - CORRECT ANSWER - Krenite is different
from most brush herbicides because:
A. It can be applied either to the foliage or the soil
B. Little effect is seen the year of application
C. Both A and B
D. None of the above
Wettable powders - CORRECT ANSWER - Which of the following formulations do not
dissolve in water?
A. Wettable powders
B. Soluble powders
C. Emulsifiable concentrate
D. All of the above dissolve in water
10 - CORRECT ANSWER - Herbicide spraying can be performed, as a general rule, until
wind speed exceeds ___ miles per hour.
Leaching - CORRECT ANSWER - The downward movements of pesticides in the soil is
called _____.
Perennial - CORRECT ANSWER - Which type of weed is best controlled in early bloom?
A. Annual
B. Biennial
C. Perennial
D. Herbaceous
UPDATED ACTUAL Exam Questions and
CORECT Answers
in early spring when sod has greened - CORRECT ANSWER - 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 - CORRECT ANSWER - Which procedures will help reduce herbicide
drift?
A. Increasing spray pressure
B. Reducing spray pressure
C. Hanging nozzles to a type which emits larger droplets
D. Reducing height of boom
E. Both B and C
They do not damage grasses - CORRECT ANSWER - Phenoxy herbicides are widely used
along roadsides because:
A. They are effective on a wide variety of broadleaf and woody species
B. They rarely damage plants in adjacent areas
C. They are high in human toxicity
D. They do not damage grasses
E. Both A and D
Dichlobenil - CORRECT ANSWER - Which of the following nonselective herbicides has
the longest period of control, when used at a given site:
,A. Bromacil
B. Dichlobenil
C. Prometon
D. Tebuthiuron
During early flowering - CORRECT ANSWER - 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 - CORRECT ANSWER - 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 - CORRECT
ANSWER - 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 drift
D. None of the above
They can damage desirable plants at very low rates, making them susceptible to drift damage -
CORRECT ANSWER - 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 - CORRECT ANSWER - Krenite is different
from most brush herbicides because:
A. It can be applied either to the foliage or the soil
B. Little effect is seen the year of application
C. Both A and B
D. None of the above
Wettable powders - CORRECT ANSWER - Which of the following formulations do not
dissolve in water?
A. Wettable powders
B. Soluble powders
C. Emulsifiable concentrate
D. All of the above dissolve in water
10 - CORRECT ANSWER - Herbicide spraying can be performed, as a general rule, until
wind speed exceeds ___ miles per hour.
Leaching - CORRECT ANSWER - The downward movements of pesticides in the soil is
called _____.
Perennial - CORRECT ANSWER - Which type of weed is best controlled in early bloom?
A. Annual
B. Biennial
C. Perennial
D. Herbaceous
