QAL – CATEGORY D EXAM: PLANT AGRICULTURE
PEST CONTROL ACTUAL QUESTIONS AND ANSWERS
- LATEST AND COMPLETE UPDATE WITH VERIFIED
SOLUTIONS – ASSURED PASS WITH ISTANT
DOWNLOAD PDF.
1. Which of the following is the most effective method to prevent the
development of pesticide resistance in a crop pest population?
A. Increasing pesticide dose
B. Frequent use of the same chemical class
C. Rotating pesticides with different modes of action
D. Using pesticide mixtures indiscriminately
Rationale: Rotating pesticides with different modes of action reduces
selective pressure and slows the development of resistance.
2. A farmer reports spotting irregular, pale spots on tomato leaves. Which pest
is most likely responsible?
A. Aphids
B. Whiteflies
C. Spider mites
D. Leafhoppers
Rationale: Spider mites feed on plant sap, causing stippling and pale spots
on leaves.
3. When applying a pesticide, which factor is least critical for ensuring
operator safety?
A. Wearing appropriate personal protective equipment
B. Reading and following label instructions
C. Applying pesticide during calm weather conditions
D. Selecting the cheapest available pesticide
, Rationale: Cost does not affect operator safety; following label
instructions, PPE, and weather conditions are essential.
4. Which of the following is an example of a biological pest control method?
A. Spraying a broad-spectrum insecticide
B. Using neem oil
C. Introducing predatory lady beetles
D. Burning infected crop residues
Rationale: Biological control relies on natural enemies, such as predatory
insects, to reduce pest populations.
5. In an Integrated Pest Management (IPM) program, which step comes first?
A. Applying chemical control
B. Monitoring and identifying pests
C. Implementing mechanical control
D. Evaluating pesticide effectiveness
Rationale: IPM begins with monitoring and correctly identifying pests to
choose appropriate control measures.
6. A pesticide’s label states “do not enter treated area for 24 hours.” This
requirement primarily protects:
A. The environment
B. Non-target pests
C. Crop yield
D. Human health
Rationale: Restricted-entry intervals are mandated to protect humans from
exposure to harmful residues.
7. Which factor most influences the choice of pesticide formulation for foliar
application?
A. Market price of the crop
, B. Labor availability
C. Target pest and leaf coverage requirements
D. Distance to the nearest storage facility
Rationale: Formulation is selected based on the pest type, application
method, and coverage needed.
8. Aphids are vectors for viral diseases in crops. Which control measure
addresses both aphids and disease spread?
A. Crop rotation
B. Use of systemic insecticides
C. Flood irrigation
D. Mulching
Rationale: Systemic insecticides control sap-sucking insects like aphids
and reduce viral transmission.
9. Which of the following is a common symptom of nematode infestation in
root crops?
A. Leaf curling only
B. Root galls or knots
C. Powdery mildew on leaves
D. Stem cankers
Rationale: Root-knot nematodes cause characteristic swelling or galls on
roots.
10.Which ethical consideration is most relevant when deciding to apply a
pesticide near a water body?
A. Crop market value
B. Minimizing environmental contamination
C. Farmer’s convenience
D. Ease of application
, Rationale: Ethical pesticide use prioritizes protecting surrounding
ecosystems, including aquatic life.
11.A pesticide with a short residual activity is preferred when:
A. Long-term control is required
B. Target pests are dormant
C. Frequent reapplication is acceptable and minimal environmental
impact is desired
D. Pests are resistant
Rationale: Short-residual pesticides degrade quickly, reducing
environmental buildup and non-target effects.
12.Which of the following is an example of mechanical pest control?
A. Introducing parasitoid wasps
B. Handpicking caterpillars from plants
C. Applying systemic insecticides
D. Using fungal biopesticides
Rationale: Mechanical control includes physical removal or barriers to
reduce pest populations.
13.During a field inspection, small holes are observed on young maize leaves
with frass at the leaf base. The most likely pest is:
A. Aphids
B. Whiteflies
C. Fall armyworm (Spodoptera frugiperda)
D. Thrips
Rationale: Fall armyworm larvae chew holes in leaves and leave frass on
the plant.
14.Which law governs the registration and use of pesticides in most countries?
A. International Plant Protection Convention
PEST CONTROL ACTUAL QUESTIONS AND ANSWERS
- LATEST AND COMPLETE UPDATE WITH VERIFIED
SOLUTIONS – ASSURED PASS WITH ISTANT
DOWNLOAD PDF.
1. Which of the following is the most effective method to prevent the
development of pesticide resistance in a crop pest population?
A. Increasing pesticide dose
B. Frequent use of the same chemical class
C. Rotating pesticides with different modes of action
D. Using pesticide mixtures indiscriminately
Rationale: Rotating pesticides with different modes of action reduces
selective pressure and slows the development of resistance.
2. A farmer reports spotting irregular, pale spots on tomato leaves. Which pest
is most likely responsible?
A. Aphids
B. Whiteflies
C. Spider mites
D. Leafhoppers
Rationale: Spider mites feed on plant sap, causing stippling and pale spots
on leaves.
3. When applying a pesticide, which factor is least critical for ensuring
operator safety?
A. Wearing appropriate personal protective equipment
B. Reading and following label instructions
C. Applying pesticide during calm weather conditions
D. Selecting the cheapest available pesticide
, Rationale: Cost does not affect operator safety; following label
instructions, PPE, and weather conditions are essential.
4. Which of the following is an example of a biological pest control method?
A. Spraying a broad-spectrum insecticide
B. Using neem oil
C. Introducing predatory lady beetles
D. Burning infected crop residues
Rationale: Biological control relies on natural enemies, such as predatory
insects, to reduce pest populations.
5. In an Integrated Pest Management (IPM) program, which step comes first?
A. Applying chemical control
B. Monitoring and identifying pests
C. Implementing mechanical control
D. Evaluating pesticide effectiveness
Rationale: IPM begins with monitoring and correctly identifying pests to
choose appropriate control measures.
6. A pesticide’s label states “do not enter treated area for 24 hours.” This
requirement primarily protects:
A. The environment
B. Non-target pests
C. Crop yield
D. Human health
Rationale: Restricted-entry intervals are mandated to protect humans from
exposure to harmful residues.
7. Which factor most influences the choice of pesticide formulation for foliar
application?
A. Market price of the crop
, B. Labor availability
C. Target pest and leaf coverage requirements
D. Distance to the nearest storage facility
Rationale: Formulation is selected based on the pest type, application
method, and coverage needed.
8. Aphids are vectors for viral diseases in crops. Which control measure
addresses both aphids and disease spread?
A. Crop rotation
B. Use of systemic insecticides
C. Flood irrigation
D. Mulching
Rationale: Systemic insecticides control sap-sucking insects like aphids
and reduce viral transmission.
9. Which of the following is a common symptom of nematode infestation in
root crops?
A. Leaf curling only
B. Root galls or knots
C. Powdery mildew on leaves
D. Stem cankers
Rationale: Root-knot nematodes cause characteristic swelling or galls on
roots.
10.Which ethical consideration is most relevant when deciding to apply a
pesticide near a water body?
A. Crop market value
B. Minimizing environmental contamination
C. Farmer’s convenience
D. Ease of application
, Rationale: Ethical pesticide use prioritizes protecting surrounding
ecosystems, including aquatic life.
11.A pesticide with a short residual activity is preferred when:
A. Long-term control is required
B. Target pests are dormant
C. Frequent reapplication is acceptable and minimal environmental
impact is desired
D. Pests are resistant
Rationale: Short-residual pesticides degrade quickly, reducing
environmental buildup and non-target effects.
12.Which of the following is an example of mechanical pest control?
A. Introducing parasitoid wasps
B. Handpicking caterpillars from plants
C. Applying systemic insecticides
D. Using fungal biopesticides
Rationale: Mechanical control includes physical removal or barriers to
reduce pest populations.
13.During a field inspection, small holes are observed on young maize leaves
with frass at the leaf base. The most likely pest is:
A. Aphids
B. Whiteflies
C. Fall armyworm (Spodoptera frugiperda)
D. Thrips
Rationale: Fall armyworm larvae chew holes in leaves and leave frass on
the plant.
14.Which law governs the registration and use of pesticides in most countries?
A. International Plant Protection Convention
