, Question 1
Under Washington's Pesticide Application Act, which party bears primary legal
responsibility if a licensed applicator applies a restricted-use pesticide in a
manner inconsistent with its labeling, even when following verbal instructions
from the farm owner?
A. The farm owner, because they directed the application.
B. The licensed applicator, because they are certified and must ensure
label compliance.
C. The pesticide dealer who sold the product, for failing to provide
written instructions.
D. The WSDA, for not providing adequate oversight.
Correct Answer: B - The licensed applicator, because they are
certified and must ensure label compliance.
RATIONALE
The certified applicator is legally responsible for ensuring applications
comply with the label, regardless of verbal instructions. Washington
law places liability on the applicator. Farm owners may share liability
in some cases, but the primary responsibility rests with the applicator.
Question 2
A pesticide label states: 'Do not apply within 50 feet of any well, sinkhole, or
surface water.' A applicator plans to treat a field adjacent to a creek. Which of
the following best describes the required buffer distance if the field slopes
toward the creek?
A. 50 feet from the creek's edge, as stated on the label.
B. A larger buffer may be required to prevent runoff; consult WSDA for
site-specific requirements.
C. No buffer is needed if the pesticide is applied at the lowest labeled
rate.
D. The buffer can be reduced if a vegetative filter strip is present.
Page 2
,Correct Answer: B - A larger buffer may be required to prevent
runoff; consult WSDA for site-specific requirements.
RATIONALE
Labels set minimum buffers, but Washington law may require larger
buffers to protect water quality, especially on sloping ground.
Applicators must follow the most restrictive requirement. A vegetative
strip may help but does not automatically reduce the labeled buffer.
Question 3
Which of the following is a key requirement for maintaining a pesticide
application record in Washington State?
A. Records must be kept for at least 7 years.
B. Records must be submitted to WSDA within 24 hours of application.
C. Records must include the applicator's license number and the EPA
registration number.
D. Records are only required for restricted-use pesticides.
Correct Answer: C - Records must include the applicator's license
number and the EPA registration number.
RATIONALE
Washington requires application records to include specific details
such as the applicator's license number and the EPA registration
number. Records must be kept for 7 years but not submitted routinely.
They are required for all pesticides, not just restricted-use.
Question 4
A grower wants to control aphids on lettuce. The field is near a school. Which
Integrated Pest Management (IPM) strategy is most appropriate as a first step?
A. Apply a broad-spectrum insecticide at the highest labeled rate.
B. Introduce natural predators like lady beetles and monitor aphid
populations.
Page 3
, C. Use a soil fumigant to eliminate all pests before planting.
D. Apply a systemic insecticide at planting to prevent infestation.
Correct Answer: B - Introduce natural predators like lady beetles
and monitor aphid populations.
RATIONALE
IPM emphasizes monitoring and biological control before chemical
intervention. Introducing predators and monitoring is the least risky
and most sustainable first step. Broad-spectrum or preventive
fumigants are not IPM-based and may harm beneficial insects or
violate school buffer zones.
Question 5
Which of the following statements about pesticide resistance management is
most accurate?
A. Rotating among pesticides with the same mode of action prevents
resistance.
B. Using the maximum labeled rate every time delays resistance
indefinitely.
C. Resistance can be managed by rotating among different
mode-of-action groups and using non-chemical controls.
D. Resistance only occurs with herbicides, not insecticides or fungicides.
Correct Answer: C - Resistance can be managed by rotating
among different mode-of-action groups and using non-chemical
controls.
RATIONALE
Resistance management requires rotating among different
mode-of-action groups and integrating non-chemical tactics. Using the
same mode of action, even at high rates, selects for resistance.
Resistance occurs in all pesticide classes.
Page 4
Under Washington's Pesticide Application Act, which party bears primary legal
responsibility if a licensed applicator applies a restricted-use pesticide in a
manner inconsistent with its labeling, even when following verbal instructions
from the farm owner?
A. The farm owner, because they directed the application.
B. The licensed applicator, because they are certified and must ensure
label compliance.
C. The pesticide dealer who sold the product, for failing to provide
written instructions.
D. The WSDA, for not providing adequate oversight.
Correct Answer: B - The licensed applicator, because they are
certified and must ensure label compliance.
RATIONALE
The certified applicator is legally responsible for ensuring applications
comply with the label, regardless of verbal instructions. Washington
law places liability on the applicator. Farm owners may share liability
in some cases, but the primary responsibility rests with the applicator.
Question 2
A pesticide label states: 'Do not apply within 50 feet of any well, sinkhole, or
surface water.' A applicator plans to treat a field adjacent to a creek. Which of
the following best describes the required buffer distance if the field slopes
toward the creek?
A. 50 feet from the creek's edge, as stated on the label.
B. A larger buffer may be required to prevent runoff; consult WSDA for
site-specific requirements.
C. No buffer is needed if the pesticide is applied at the lowest labeled
rate.
D. The buffer can be reduced if a vegetative filter strip is present.
Page 2
,Correct Answer: B - A larger buffer may be required to prevent
runoff; consult WSDA for site-specific requirements.
RATIONALE
Labels set minimum buffers, but Washington law may require larger
buffers to protect water quality, especially on sloping ground.
Applicators must follow the most restrictive requirement. A vegetative
strip may help but does not automatically reduce the labeled buffer.
Question 3
Which of the following is a key requirement for maintaining a pesticide
application record in Washington State?
A. Records must be kept for at least 7 years.
B. Records must be submitted to WSDA within 24 hours of application.
C. Records must include the applicator's license number and the EPA
registration number.
D. Records are only required for restricted-use pesticides.
Correct Answer: C - Records must include the applicator's license
number and the EPA registration number.
RATIONALE
Washington requires application records to include specific details
such as the applicator's license number and the EPA registration
number. Records must be kept for 7 years but not submitted routinely.
They are required for all pesticides, not just restricted-use.
Question 4
A grower wants to control aphids on lettuce. The field is near a school. Which
Integrated Pest Management (IPM) strategy is most appropriate as a first step?
A. Apply a broad-spectrum insecticide at the highest labeled rate.
B. Introduce natural predators like lady beetles and monitor aphid
populations.
Page 3
, C. Use a soil fumigant to eliminate all pests before planting.
D. Apply a systemic insecticide at planting to prevent infestation.
Correct Answer: B - Introduce natural predators like lady beetles
and monitor aphid populations.
RATIONALE
IPM emphasizes monitoring and biological control before chemical
intervention. Introducing predators and monitoring is the least risky
and most sustainable first step. Broad-spectrum or preventive
fumigants are not IPM-based and may harm beneficial insects or
violate school buffer zones.
Question 5
Which of the following statements about pesticide resistance management is
most accurate?
A. Rotating among pesticides with the same mode of action prevents
resistance.
B. Using the maximum labeled rate every time delays resistance
indefinitely.
C. Resistance can be managed by rotating among different
mode-of-action groups and using non-chemical controls.
D. Resistance only occurs with herbicides, not insecticides or fungicides.
Correct Answer: C - Resistance can be managed by rotating
among different mode-of-action groups and using non-chemical
controls.
RATIONALE
Resistance management requires rotating among different
mode-of-action groups and integrating non-chemical tactics. Using the
same mode of action, even at high rates, selects for resistance.
Resistance occurs in all pesticide classes.
Page 4
