Texas Category E — Aquatic Pest
Control Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary goal of aquatic pest control?
A. Eliminate all aquatic life
B. Improve water clarity only
C. Manage unwanted aquatic organisms while protecting the
ecosystem
D. Increase fish production only
Answer: C
Rationale: Aquatic pest control aims to balance control of pests while
preserving ecological integrity.
2. Which plant is a common invasive aquatic weed in Texas?
A. Hydrilla
B. Bermuda grass
, C. Oak tree
D. Pine grass
Answer: A
Rationale: Hydrilla is a highly invasive submerged aquatic plant.
3. Dissolved oxygen in water is important because it:
A. Increases water color
B. Supports aquatic life respiration
C. Controls water temperature
D. Prevents herbicide breakdown
Answer: B
Rationale: Aquatic organisms depend on dissolved oxygen for
survival.
4. Which method is commonly used for aquatic herbicide application?
A. Soil injection
B. Aerial seed drop
C. Surface spraying
D. Bark painting
Answer: C
Rationale: Surface spraying is commonly used for floating and
emergent weeds.
5. Eutrophication is caused primarily by:
A. Oxygen injection
, B. Excess nutrients like nitrogen and phosphorus
C. Low water temperature
D. Fish stocking
Answer: B
Rationale: Nutrient overload leads to algal blooms and oxygen
depletion.
6. Which PPE is essential when applying aquatic herbicides?
A. Sandals
B. Respirator and gloves
C. Sunglasses only
D. Hat only
Answer: B
Rationale: Chemical exposure risk requires protective equipment.
7. A selective herbicide:
A. Kills all plants
B. Targets specific species
C. Kills fish
D. Works only in soil
Answer: B
Rationale: Selective herbicides target specific plant types.
8. Which aquatic weed floats on the surface?
A. Hydrilla
, B. Water hyacinth
C. Elodea
D. Vallisneria
Answer: B
Rationale: Water hyacinth is a free-floating invasive plant.
9. Drift in aquatic pesticide application refers to:
A. Water flow
B. Movement of chemicals away from target area
C. Fish migration
D. Plant growth
Answer: B
Rationale: Drift reduces effectiveness and causes environmental
damage.
10. Integrated Pest Management (IPM) in aquatic systems includes:
A. Chemical use only
B. Biological, mechanical, and chemical control
C. Fertilizer use only
D. Fish removal only
Answer: B
Rationale: IPM uses multiple control strategies.
11. Which organism is a biological control agent for aquatic weeds?
A. Grass carp
Control Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary goal of aquatic pest control?
A. Eliminate all aquatic life
B. Improve water clarity only
C. Manage unwanted aquatic organisms while protecting the
ecosystem
D. Increase fish production only
Answer: C
Rationale: Aquatic pest control aims to balance control of pests while
preserving ecological integrity.
2. Which plant is a common invasive aquatic weed in Texas?
A. Hydrilla
B. Bermuda grass
, C. Oak tree
D. Pine grass
Answer: A
Rationale: Hydrilla is a highly invasive submerged aquatic plant.
3. Dissolved oxygen in water is important because it:
A. Increases water color
B. Supports aquatic life respiration
C. Controls water temperature
D. Prevents herbicide breakdown
Answer: B
Rationale: Aquatic organisms depend on dissolved oxygen for
survival.
4. Which method is commonly used for aquatic herbicide application?
A. Soil injection
B. Aerial seed drop
C. Surface spraying
D. Bark painting
Answer: C
Rationale: Surface spraying is commonly used for floating and
emergent weeds.
5. Eutrophication is caused primarily by:
A. Oxygen injection
, B. Excess nutrients like nitrogen and phosphorus
C. Low water temperature
D. Fish stocking
Answer: B
Rationale: Nutrient overload leads to algal blooms and oxygen
depletion.
6. Which PPE is essential when applying aquatic herbicides?
A. Sandals
B. Respirator and gloves
C. Sunglasses only
D. Hat only
Answer: B
Rationale: Chemical exposure risk requires protective equipment.
7. A selective herbicide:
A. Kills all plants
B. Targets specific species
C. Kills fish
D. Works only in soil
Answer: B
Rationale: Selective herbicides target specific plant types.
8. Which aquatic weed floats on the surface?
A. Hydrilla
, B. Water hyacinth
C. Elodea
D. Vallisneria
Answer: B
Rationale: Water hyacinth is a free-floating invasive plant.
9. Drift in aquatic pesticide application refers to:
A. Water flow
B. Movement of chemicals away from target area
C. Fish migration
D. Plant growth
Answer: B
Rationale: Drift reduces effectiveness and causes environmental
damage.
10. Integrated Pest Management (IPM) in aquatic systems includes:
A. Chemical use only
B. Biological, mechanical, and chemical control
C. Fertilizer use only
D. Fish removal only
Answer: B
Rationale: IPM uses multiple control strategies.
11. Which organism is a biological control agent for aquatic weeds?
A. Grass carp
