Ohio pesticide applicator field crops study guide
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. Which of the following herbicides is least volatile?
A. Clomazone
B. Dicamba
C. The ester formulation of 2,4-D
D. The amine formulation of 2,4-D - Correct Answer: D
2. Herbicide carryover problems are increased when:
A. Soil temperatures are lower than normal
B. Rainfall is lower than normal
C. A herbicide persists for a long time
D. All of the above - Correct Answer: D
3. The herbicide for which carryover is not a problem is:
A. Atrazine
B. Trifluralin
C. Glyphosate
D. Simazine - Correct Answer: C
4. When sensitive plants are grown in the "suspect" soil and compared to
growth in a similar soil not treated with the herbicide in question, it is
called:
, A. Growth chart
B. Bioassay
C. Application test
D. None of the above - Correct Answer: B
5. Herbicides that are active and applied at low rates require thorough
cleaning of the sprayer and accurate calibration.
True or false? - Correct Answer: True
6. For which type of herbicide are adjuvants such as non ionic surfactant,
methylated seed oils, crop oil concentrates, and a nitrogen fertilizer
necessary to achieve maximum weed control?
A. Preemergence herbicides
B. Preplant incorporated herbicides
C. Postemergence herbicides
D. Residual herbicides - Correct Answer: C
7. Which of the following practices is most important in reducing development
of herbicide resistant weeds?
A. Using multiple tillage practices
B. Using only one herbicide site of action
C. Using several different herbicide sites of action
D. Using continuous genetically modified corn - Correct Answer: C
8. Which of the following herbicides have some weeds beginning to show
resistance to the herbicide's action?
A. Paraguay
B. Glyphosate
C. 2,4-D
, D. None of the above - Correct Answer: B
9. 2,4-D mode of action:
A. Growth regulator
B. Photosynthesis inhibitor
C. ALS inhibitor - Correct Answer: A
10.Dicamba mode of action:
A. Growth regulator
B. Photosynthesis inhibitor
C. ALS inhibitor - Correct Answer: A
11.Atrazine mode of action:
A. Growth regulator
B. Photosynthesis inhibitor
C. ALS inhibitor - Correct Answer: B
12.Simazine mode of action:
A. Growth regulator
B. Photosynthesis inhibitor
C. ALS inhibitor - Correct Answer: B
13.Applied after the crop and weeds have emerged from the soil surface -
Correct Answer: Postemergent
14.Taken up by the plant and translocated through the plant to control the
plant's growth - Correct Answer: Systemic
, 15.A chemical used to control only certain plant species and not harm others -
Correct Answer: Selective
16.Destroys only the plant tissue that the chemical touches. Generally fast
acting and less effective on perennial plants, which are capable of regrowth
through roots or tubers - Correct Answer: Contact
17.Applied to the soil surface after the crop is planted but before the seedlings
and weeds appear above the soil surface - Correct Answer:
Preemergent
18.To blend or combine into the soil before the crop is planted prior to weed
emergence - Correct Answer: Preplant incorporated
19.A chemical used to control many types of plants at the same, for example,
both grassy and broadleaf weeds - Correct Answer: Non selective
20.Is glyphosate selective or non selective? - Correct Answer: Non selective
21.Is 2,4-D selective of non selective? - Correct Answer: Selective
22.Is Paraquat selective or non selective? - Correct Answer: Non selective
23.Is Dicamba selective or non selective? - Correct Answer: Selective
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. Which of the following herbicides is least volatile?
A. Clomazone
B. Dicamba
C. The ester formulation of 2,4-D
D. The amine formulation of 2,4-D - Correct Answer: D
2. Herbicide carryover problems are increased when:
A. Soil temperatures are lower than normal
B. Rainfall is lower than normal
C. A herbicide persists for a long time
D. All of the above - Correct Answer: D
3. The herbicide for which carryover is not a problem is:
A. Atrazine
B. Trifluralin
C. Glyphosate
D. Simazine - Correct Answer: C
4. When sensitive plants are grown in the "suspect" soil and compared to
growth in a similar soil not treated with the herbicide in question, it is
called:
, A. Growth chart
B. Bioassay
C. Application test
D. None of the above - Correct Answer: B
5. Herbicides that are active and applied at low rates require thorough
cleaning of the sprayer and accurate calibration.
True or false? - Correct Answer: True
6. For which type of herbicide are adjuvants such as non ionic surfactant,
methylated seed oils, crop oil concentrates, and a nitrogen fertilizer
necessary to achieve maximum weed control?
A. Preemergence herbicides
B. Preplant incorporated herbicides
C. Postemergence herbicides
D. Residual herbicides - Correct Answer: C
7. Which of the following practices is most important in reducing development
of herbicide resistant weeds?
A. Using multiple tillage practices
B. Using only one herbicide site of action
C. Using several different herbicide sites of action
D. Using continuous genetically modified corn - Correct Answer: C
8. Which of the following herbicides have some weeds beginning to show
resistance to the herbicide's action?
A. Paraguay
B. Glyphosate
C. 2,4-D
, D. None of the above - Correct Answer: B
9. 2,4-D mode of action:
A. Growth regulator
B. Photosynthesis inhibitor
C. ALS inhibitor - Correct Answer: A
10.Dicamba mode of action:
A. Growth regulator
B. Photosynthesis inhibitor
C. ALS inhibitor - Correct Answer: A
11.Atrazine mode of action:
A. Growth regulator
B. Photosynthesis inhibitor
C. ALS inhibitor - Correct Answer: B
12.Simazine mode of action:
A. Growth regulator
B. Photosynthesis inhibitor
C. ALS inhibitor - Correct Answer: B
13.Applied after the crop and weeds have emerged from the soil surface -
Correct Answer: Postemergent
14.Taken up by the plant and translocated through the plant to control the
plant's growth - Correct Answer: Systemic
, 15.A chemical used to control only certain plant species and not harm others -
Correct Answer: Selective
16.Destroys only the plant tissue that the chemical touches. Generally fast
acting and less effective on perennial plants, which are capable of regrowth
through roots or tubers - Correct Answer: Contact
17.Applied to the soil surface after the crop is planted but before the seedlings
and weeds appear above the soil surface - Correct Answer:
Preemergent
18.To blend or combine into the soil before the crop is planted prior to weed
emergence - Correct Answer: Preplant incorporated
19.A chemical used to control many types of plants at the same, for example,
both grassy and broadleaf weeds - Correct Answer: Non selective
20.Is glyphosate selective or non selective? - Correct Answer: Non selective
21.Is 2,4-D selective of non selective? - Correct Answer: Selective
22.Is Paraquat selective or non selective? - Correct Answer: Non selective
23.Is Dicamba selective or non selective? - Correct Answer: Selective
