Page 1 of 30
WASHINGTON PESTICIDE LAWS AND SAFETY TEST,
PRACTICE EXAM 2026 QUESTIONS LATEST EXAM SOLVED
QUESTIONS & ANSWERS VERIFIED 100% GRADED A+
Which of the following is not registered as a pesticide under WA state law:
a. drift retardants
b. plant growth regulator
c. nematicides
d. nitrogen fertilizer
d. nitrogen fertilizer
Why are some pesticides classified as "restricted use?"
Their use is a hazard to the applicator or the environment
What does not have to be on your application records:
a. relative humidity
b. wind conditions
a. relative humidity
Organophosphate and carbamate insecticides have the most direct effects on
what major body system?
Nervous system
Which of the following pesticide characteristics contribute to an increased
potential for groundwater contamination:
a. high solubility
b. high absorption to soils
c. relatively quick degradation properties
d. high volatility
a. high solubility
Pre-harvest intervals stated on a pesticide label are designed to _____.
protect produce from residues over tolerances
For which pesticides can 2-PAM be used as an antidote?
organophosphates
Which conditions contribute to most spray drift?
, Page 2 of 30
Small orifice, high pressure
EPA
Regulates federal pesticide and environmental issues
OSHA
Occupational Safety and Health Administration- Regulates worker safety issues
DOT
Regulates Transportation Issues
L&I
Regulates employee safety
Define the difference between Absorption vs Adsorption
Absorbed vs Adhered
Phytotoxicity
The toxic effect by a compound on plant growth
Emulsifiable Concentrate
Liquid formulations with the active ingredient dissolved in one or more petroleum
solvents
Adjuvant
A chemical added to a pesticide to performance and safety
Surfactant
Adjuvant that alter the dispersing, spreading, and wetting properties
List the signal words from high toxicity to low
Danger-Posion
Danger-Peligro (Corrosion)
Warning
Caution
REI
Restricted-entry interval
Volatilization
The transformation of a solid or liquid into a gas
Microbial Degration
When microorganisms use pesticide as food
FIFRA
Grants the EPA the authority to regulate pesticides
SLN
, Page 3 of 30
Special Location Need
The most common cause for growth of moss in lawns is:
Lack of soil fertility
Best time to spray pesticides for moss, algae, lichen:
Winter
Breeding or selecting plants and animals with characteristics for resistance to
pests is an example of which type of pest management method?
A. Biological control.
B. Mechanical control.
C. Genetic Control.
D. Physical/ environmental modificaiton.
C
Using a plow to destry weeeds is an example of which type of mechanical
control method?
A. Exclusion.
B. Trapping.
C. Cultivation.
D. Physical/ environmental modification.
C
Which statement is true about chemical control as a pest management
method?
A. Pesticides play a key role in pest management programs and sometimes are
the only control method available.
B. Pesticides include any material that is applied to plants and the soil but not
to water or harvested crops.
C. A highly selective pesticide controls a wide variety of pests.
D. Systemic pesticides are not absorbed by treated plants or animals.
A
Which statement is true about pest management goals?
A. Pestcides are never used to prevent pests.
B. Preventive and suppressive pest control goals are rarely combined.
C. Cultiviation and mowing of weeds are ways to prevent and suppress pest
populations.
D. Over large areas, eradication is a practical approach to pest cotnrol.
WASHINGTON PESTICIDE LAWS AND SAFETY TEST,
PRACTICE EXAM 2026 QUESTIONS LATEST EXAM SOLVED
QUESTIONS & ANSWERS VERIFIED 100% GRADED A+
Which of the following is not registered as a pesticide under WA state law:
a. drift retardants
b. plant growth regulator
c. nematicides
d. nitrogen fertilizer
d. nitrogen fertilizer
Why are some pesticides classified as "restricted use?"
Their use is a hazard to the applicator or the environment
What does not have to be on your application records:
a. relative humidity
b. wind conditions
a. relative humidity
Organophosphate and carbamate insecticides have the most direct effects on
what major body system?
Nervous system
Which of the following pesticide characteristics contribute to an increased
potential for groundwater contamination:
a. high solubility
b. high absorption to soils
c. relatively quick degradation properties
d. high volatility
a. high solubility
Pre-harvest intervals stated on a pesticide label are designed to _____.
protect produce from residues over tolerances
For which pesticides can 2-PAM be used as an antidote?
organophosphates
Which conditions contribute to most spray drift?
, Page 2 of 30
Small orifice, high pressure
EPA
Regulates federal pesticide and environmental issues
OSHA
Occupational Safety and Health Administration- Regulates worker safety issues
DOT
Regulates Transportation Issues
L&I
Regulates employee safety
Define the difference between Absorption vs Adsorption
Absorbed vs Adhered
Phytotoxicity
The toxic effect by a compound on plant growth
Emulsifiable Concentrate
Liquid formulations with the active ingredient dissolved in one or more petroleum
solvents
Adjuvant
A chemical added to a pesticide to performance and safety
Surfactant
Adjuvant that alter the dispersing, spreading, and wetting properties
List the signal words from high toxicity to low
Danger-Posion
Danger-Peligro (Corrosion)
Warning
Caution
REI
Restricted-entry interval
Volatilization
The transformation of a solid or liquid into a gas
Microbial Degration
When microorganisms use pesticide as food
FIFRA
Grants the EPA the authority to regulate pesticides
SLN
, Page 3 of 30
Special Location Need
The most common cause for growth of moss in lawns is:
Lack of soil fertility
Best time to spray pesticides for moss, algae, lichen:
Winter
Breeding or selecting plants and animals with characteristics for resistance to
pests is an example of which type of pest management method?
A. Biological control.
B. Mechanical control.
C. Genetic Control.
D. Physical/ environmental modificaiton.
C
Using a plow to destry weeeds is an example of which type of mechanical
control method?
A. Exclusion.
B. Trapping.
C. Cultivation.
D. Physical/ environmental modification.
C
Which statement is true about chemical control as a pest management
method?
A. Pesticides play a key role in pest management programs and sometimes are
the only control method available.
B. Pesticides include any material that is applied to plants and the soil but not
to water or harvested crops.
C. A highly selective pesticide controls a wide variety of pests.
D. Systemic pesticides are not absorbed by treated plants or animals.
A
Which statement is true about pest management goals?
A. Pestcides are never used to prevent pests.
B. Preventive and suppressive pest control goals are rarely combined.
C. Cultiviation and mowing of weeds are ways to prevent and suppress pest
populations.
D. Over large areas, eradication is a practical approach to pest cotnrol.
