Ohio Commercial Pesticide Applicator
Category 10d – Vector Control Exam –
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of vector control in public health?
A. To increase biodiversity
B. To reduce pesticide usage
C. To prevent disease transmission
D. To improve water quality
Rationale: Vector control focuses on controlling organisms like mosquitoes
and rodents that transmit diseases to humans.
2. Which mosquito genus is the primary vector for West Nile virus in
Ohio?
, A. Anopheles
B. Culex
C. Aedes
D. Mansonia
Rationale: Culex species are the main carriers of West Nile virus in Ohio.
3. Which disease is commonly transmitted by Aedes albopictus?
A. Malaria
B. Lyme disease
C. Dengue fever
D. West Nile virus
Rationale: Aedes albopictus, the Asian tiger mosquito, is capable of
transmitting dengue, Zika, and chikungunya viruses.
4. What is the most effective method to control mosquito larvae?
A. Spraying adulticides
B. Using repellents on humans
C. Eliminating standing water
D. Introducing bats
Rationale: Removing breeding sites reduces mosquito populations before
they reach adulthood.
, 5. Which rodent species is most commonly associated with hantavirus in
the U.S.?
A. House mouse
B. Deer mouse
C. Norway rat
D. Black rat
Rationale: Deer mice carry hantavirus, which can be transmitted to
humans via droppings or urine.
6. Which of the following is considered a biological control method?
A. ULV fogging
B. Introducing mosquito fish to ponds
C. Spraying insect growth regulators
D. Applying rodenticide
Rationale: Biological control uses natural predators, such as fish that eat
mosquito larvae.
7. What type of pesticide formulation is commonly used for residual
indoor mosquito control?
A. Wettable powder
B. Emulsifiable concentrate
, C. Granules
D. Bait
Rationale: Emulsifiable concentrates adhere well to surfaces and provide
lasting residual effects.
8. What is the safe minimum distance from water bodies when applying
chemical pesticides?
A. 1 foot
B. 5 feet
C. 10 feet
D. As specified on the label
Rationale: Label instructions dictate safe distances to prevent
environmental contamination.
9. Which term describes the ability of a mosquito to transmit a
pathogen?
A. Host preference
B. Vector competence
C. Pathogen resistance
D. Vector efficiency
Rationale: Vector competence refers to a vector’s capacity to acquire and
transmit a pathogen.
Category 10d – Vector Control Exam –
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of vector control in public health?
A. To increase biodiversity
B. To reduce pesticide usage
C. To prevent disease transmission
D. To improve water quality
Rationale: Vector control focuses on controlling organisms like mosquitoes
and rodents that transmit diseases to humans.
2. Which mosquito genus is the primary vector for West Nile virus in
Ohio?
, A. Anopheles
B. Culex
C. Aedes
D. Mansonia
Rationale: Culex species are the main carriers of West Nile virus in Ohio.
3. Which disease is commonly transmitted by Aedes albopictus?
A. Malaria
B. Lyme disease
C. Dengue fever
D. West Nile virus
Rationale: Aedes albopictus, the Asian tiger mosquito, is capable of
transmitting dengue, Zika, and chikungunya viruses.
4. What is the most effective method to control mosquito larvae?
A. Spraying adulticides
B. Using repellents on humans
C. Eliminating standing water
D. Introducing bats
Rationale: Removing breeding sites reduces mosquito populations before
they reach adulthood.
, 5. Which rodent species is most commonly associated with hantavirus in
the U.S.?
A. House mouse
B. Deer mouse
C. Norway rat
D. Black rat
Rationale: Deer mice carry hantavirus, which can be transmitted to
humans via droppings or urine.
6. Which of the following is considered a biological control method?
A. ULV fogging
B. Introducing mosquito fish to ponds
C. Spraying insect growth regulators
D. Applying rodenticide
Rationale: Biological control uses natural predators, such as fish that eat
mosquito larvae.
7. What type of pesticide formulation is commonly used for residual
indoor mosquito control?
A. Wettable powder
B. Emulsifiable concentrate
, C. Granules
D. Bait
Rationale: Emulsifiable concentrates adhere well to surfaces and provide
lasting residual effects.
8. What is the safe minimum distance from water bodies when applying
chemical pesticides?
A. 1 foot
B. 5 feet
C. 10 feet
D. As specified on the label
Rationale: Label instructions dictate safe distances to prevent
environmental contamination.
9. Which term describes the ability of a mosquito to transmit a
pathogen?
A. Host preference
B. Vector competence
C. Pathogen resistance
D. Vector efficiency
Rationale: Vector competence refers to a vector’s capacity to acquire and
transmit a pathogen.
