Washington Category 7 — Industrial
Vegetation Pest Control Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of industrial vegetation pest control?
A. Increase crop yield
B. Eliminate all plant life permanently
C. Manage unwanted vegetation in non-crop areas
D. Improve ornamental plant growth
Answer: C
Rationale: Industrial vegetation control focuses on managing
unwanted plants along rights-of-way, industrial sites, railways, and
similar non-crop areas.
2. Which herbicide type kills only the plant tissue it contacts?
A. Systemic herbicide
B. Selective herbicide
, C. Contact herbicide
D. Pre-emergent herbicide
Answer: C
Rationale: Contact herbicides affect only the exposed plant parts and
do not move within the plant.
3. Systemic herbicides work by:
A. Remaining on leaf surfaces only
B. Moving within the plant’s vascular system
C. Evaporating quickly after application
D. Killing insects on contact
Answer: B
Rationale: Systemic herbicides are absorbed and translocated
throughout the plant.
4. What is the most common method of herbicide entry into plants?
A. Roots only
B. Stomata only
C. Leaves
D. Bark wounds only
Answer: C
Rationale: Foliar absorption through leaves is the most common
route of herbicide entry.
,5. A non-selective herbicide:
A. Kills only grasses
B. Kills all vegetation it contacts
C. Only affects broadleaf plants
D. Only affects aquatic plants
Answer: B
Rationale: Non-selective herbicides damage or kill most plant
species.
6. What is drift in pesticide application?
A. Movement of pesticide into soil
B. Movement of pesticide away from target site
C. Breakdown of pesticide in sunlight
D. Mixing pesticides incorrectly
Answer: B
Rationale: Drift occurs when pesticide particles move off-target
during or after application.
7. Which factor increases pesticide drift?
A. Low wind speed
B. Large droplet size
C. High wind speed
D. High humidity
Answer: C
, Rationale: Strong winds carry spray droplets away from the target
area.
8. The label is considered:
A. A suggestion only
B. A legal document
C. Optional reading
D. Advertising material
Answer: B
Rationale: Pesticide labels are legally binding instructions for use.
9. Pre-emergent herbicides are applied:
A. After weeds are fully grown
B. Before weeds emerge
C. Only in winter
D. Only on woody plants
Answer: B
Rationale: Pre-emergent herbicides prevent weed seed germination.
10. The best time to apply systemic herbicides is often:
A. During drought stress
B. When plants are actively growing
C. During freezing temperatures
D. At night only
Vegetation Pest Control Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of industrial vegetation pest control?
A. Increase crop yield
B. Eliminate all plant life permanently
C. Manage unwanted vegetation in non-crop areas
D. Improve ornamental plant growth
Answer: C
Rationale: Industrial vegetation control focuses on managing
unwanted plants along rights-of-way, industrial sites, railways, and
similar non-crop areas.
2. Which herbicide type kills only the plant tissue it contacts?
A. Systemic herbicide
B. Selective herbicide
, C. Contact herbicide
D. Pre-emergent herbicide
Answer: C
Rationale: Contact herbicides affect only the exposed plant parts and
do not move within the plant.
3. Systemic herbicides work by:
A. Remaining on leaf surfaces only
B. Moving within the plant’s vascular system
C. Evaporating quickly after application
D. Killing insects on contact
Answer: B
Rationale: Systemic herbicides are absorbed and translocated
throughout the plant.
4. What is the most common method of herbicide entry into plants?
A. Roots only
B. Stomata only
C. Leaves
D. Bark wounds only
Answer: C
Rationale: Foliar absorption through leaves is the most common
route of herbicide entry.
,5. A non-selective herbicide:
A. Kills only grasses
B. Kills all vegetation it contacts
C. Only affects broadleaf plants
D. Only affects aquatic plants
Answer: B
Rationale: Non-selective herbicides damage or kill most plant
species.
6. What is drift in pesticide application?
A. Movement of pesticide into soil
B. Movement of pesticide away from target site
C. Breakdown of pesticide in sunlight
D. Mixing pesticides incorrectly
Answer: B
Rationale: Drift occurs when pesticide particles move off-target
during or after application.
7. Which factor increases pesticide drift?
A. Low wind speed
B. Large droplet size
C. High wind speed
D. High humidity
Answer: C
, Rationale: Strong winds carry spray droplets away from the target
area.
8. The label is considered:
A. A suggestion only
B. A legal document
C. Optional reading
D. Advertising material
Answer: B
Rationale: Pesticide labels are legally binding instructions for use.
9. Pre-emergent herbicides are applied:
A. After weeds are fully grown
B. Before weeds emerge
C. Only in winter
D. Only on woody plants
Answer: B
Rationale: Pre-emergent herbicides prevent weed seed germination.
10. The best time to apply systemic herbicides is often:
A. During drought stress
B. When plants are actively growing
C. During freezing temperatures
D. At night only
